Cannabis Seed Growing Blog
Expert guides on germination, indoor growing, outdoor harvests, strain selection, and troubleshooting. Written by cultivators for American growers.
Featured Guides
Autoflowering Seed Germination: Step-by-Step Guide | Royal King Seeds
Autoflowering seed germination guide: paper towel, water glass, and direct soil methods with timing data. Avoid the 3 mistakes that kill auto seeds before they sprout.
Mar 30, 2026EssentialCannabis Growing Lights and Phases: LED, HPS, and PAR Targets | Royal King Seeds
Learn cannabis grow light selection, PAR targets by stage, and light cycle management. Compare LED vs HPS and discover the spectrum science that drives yield and potency.
Mar 30, 2026EssentialCannabis Trichomes and Harvest Timing: Peak Potency Guide | Royal King Seeds
Learn to read cannabis trichomes for perfect harvest timing. Covers milky, amber, and clear stages, the tools you need, and how timing shifts cannabinoid ratios.
Mar 30, 2026Latest Posts
Cannabis Nutrient Deficiencies: Identify & Fix | Royal King Seeds
Cannabis nutrient deficiencies show as yellowing, spots, or curl within 3-7 days of onset. The 7 most common are nitrogen, phosphorus, potassium, calcium, magnesium, iron, and zinc β each with distinct leaf symptoms and targeted fixes.
By Royal King Seeds Editorial TeamCannabis Leaves Curling Down: Causes & Fixes | Royal King Seeds
Cannabis leaves curl down due to overwatering, heat stress, nitrogen toxicity, or root problems β fix it by checking soil moisture, temps (65β85Β°F), and feeding schedules within 24β48 hours.
By Royal King Seeds Editorial TeamHow to LST Cannabis Plants Week by Week | Royal King Seeds
LST (low-stress training) starts at week 2-3 of veg, uses soft ties to bend the main stem horizontal, and can increase yields by 20-40% by creating an even canopy with 6-12 bud sites instead of 1.
By Royal King Seeds Editorial TeamBest Autoflower Strains for Zones 5 & 6 | Royal King Seeds
The best autoflower strains for USDA Zones 5 & 6 finish in 70β85 days, tolerate nights below 50Β°F, and harvest by late September β Northern Lights Auto and Blueberry Auto lead the ranking.
By Royal King Seeds Editorial TeamNorthern Lights vs OG Kush: Best Indica | Royal King Seeds
Northern Lights finishes in 45β50 days of flower with 18β22% THC and very high mold resistance β OG Kush takes 55β63 days with 20β26% THC but needs careful humidity control. Here's which wins for home growers.
By Royal King Seeds Editorial TeamTriploid Cannabis Seeds Explained: Bigger Yields, Seedless Flower, and the Tradeoffs | Royal King Seeds
Triploid cannabis seeds promise 20-50% bigger yields and fully seedless flower under pollen pressure. Here is what triploids actually are, what current data shows on potency and terpenes, and whether they belong in your next grow.
By Royal King Seeds Editorial TeamStart Growing Cannabis
New to growing? Follow this step-by-step path from seed to harvest.
Fix Your Grow Problems
Something wrong with your plant? Find the answer fast.
Cannabis Nutrient Burn and Light Stress: Fix It Fast | Royal King Seeds
Learn to identify and fix cannabis nutrient burn and light stress with real grow data. Covers symptom diagnosis, EC correction, light distance, and recovery protocols.
Read fix βCannabis Pest Management: IPM Guide for Every US Grower | Royal King Seeds
Learn to identify, prevent, and eliminate cannabis pests with integrated pest management. Covers spider mites, fungus gnats, aphids, botrytis, and powdery mildew.
Read fix βNeuroprotective Effects of Cannabis Flavonoids.
If you are working through neuroprotective effects of flavonoids. for the first time or troubleshooting an active issue, this guide covers the specificβ¦
Read fix βPest and Disease Management in Medical Cannabis.
Pest Disease Management Medical Cannabis. affects the final yield and flower quality more than most growers realize.
Read fix βThe 5 Best Ways to Check for Moldy Cannabis, Plus How
affects the final yield and flower quality more than most growers realize. The growers who consistently produce top-shelf results manage the 5 best waysβ¦
Read fix βWhat is Mildew and How to Combat it?
affects the final yield and flower quality more than most growers realize. The growers who consistently produce top-shelf results manage what is mildewβ¦
Read fix βBrowse by Topic
Beginner Guides
First-time grower essentials
121 articlesπ§Germination
Seed starting & seedling care
11 articlesπ‘Indoor Growing
Lights, tents, airflow & feeding
55 articlesβοΈOutdoor Growing
Climate, pests & photoperiods
9 articlesβ‘Autoflower Guides
Auto-specific growing advice
1 articlesπ§¬Strain Guides
Reviews, comparisons & picks
38 articlesπ§ͺNutrients & Soil
Feeding, pH & deficiencies
105 articlesπ§Troubleshooting
Pests, diseases & fixes
49 articlesβοΈHarvest & Curing
Trichomes, drying & storage
15 articlesβTraining & Pruning
LST, topping & canopy work
415 articlesπ¬Terpenes & Effects
Cannabinoids, flavors & science
68 articlesπ§¬Genetics & Breeding
Phenotypes, cloning & seeds
12 articlesMost Popular Guides
Cannabis Nutrient Deficiencies: Identify & Fix | Royal King Seeds
Cannabis nutrient deficiencies show as yellowing, spots, or curl within 3-7 days of onset. The 7 most common are nitrogen, phosphorus, potassium, calcium, magnesium, iron, and zinc β each with distinct leaf symptoms and targeted fixes.
Cannabis Leaves Curling Down: Causes & Fixes | Royal King Seeds
Cannabis leaves curl down due to overwatering, heat stress, nitrogen toxicity, or root problems β fix it by checking soil moisture, temps (65β85Β°F), and feeding schedules within 24β48 hours.
How to LST Cannabis Plants Week by Week | Royal King Seeds
LST (low-stress training) starts at week 2-3 of veg, uses soft ties to bend the main stem horizontal, and can increase yields by 20-40% by creating an even canopy with 6-12 bud sites instead of 1.
Best Autoflower Strains for Zones 5 & 6 | Royal King Seeds
The best autoflower strains for USDA Zones 5 & 6 finish in 70β85 days, tolerate nights below 50Β°F, and harvest by late September β Northern Lights Auto and Blueberry Auto lead the ranking.
Northern Lights vs OG Kush: Best Indica | Royal King Seeds
Northern Lights finishes in 45β50 days of flower with 18β22% THC and very high mold resistance β OG Kush takes 55β63 days with 20β26% THC but needs careful humidity control. Here's which wins for home growers.
Triploid Cannabis Seeds Explained: Bigger Yields, Seedless Flower, and the Tradeoffs | Royal King Seeds
Triploid cannabis seeds promise 20-50% bigger yields and fully seedless flower under pollen pressure. Here is what triploids actually are, what current data shows on potency and terpenes, and whether they belong in your next grow.
Granddaddy Purple Seeds: The Complete Buying & Growing Guide for US Growers | Royal King Seeds
Granddaddy Purple seeds: lineage, terpene profile, yield, flowering time, indoor and outdoor grow tips, harvest window, and the strains that compare to GDP. Discreet US shipping with 95% germination guarantee.
Best Low-THC Daytime Cannabis Strains for Functional Use | Royal King Seeds
Low-THC daytime cannabis strains under 12% THC, often CBD-rich, that deliver real therapeutic effect without the intoxication that takes you out of your day. Real picks, terpene profiles, and the case for the lower end of the cannabinoid scale.
How to Cure Cannabis the Right Way | Royal King Seeds
Curing cannabis takes 2β8 weeks in sealed glass jars at 60β65% RH and 60β70Β°F, burping daily for week 1 locks in terpenes, potency, and smooth smoke.
Watering Cannabis: How and When to Do It Right | Royal King Seeds
Water cannabis when the top 1β2 inches of soil are dry and pots feel light, typically every 2β3 days indoors. Use pH 6.0β7.0 water at 65β75Β°F and soak until 20% runoff for optimal root health.
Black Weed: Best Black Cannabis Strains | Royal King Seeds
Black cannabis strains like Black Tuna, Black Domina, and Black Mamba get their dark purple-to-black color from anthocyanin pigments, delivering 22β28% THC with heavy indica effects and dense resin.
How Long Does It Take to Grow Weed? | Royal King Seeds
How long does it take to grow weed? Get exact timelines by stage, strain type & setup so US growers can plan their first or next harvest confidently.
Shop by Growing Goal
Match your growing goals to the right seeds.
π±Beginner Guides
First-time grower essentials
Cannabis Leaves Curling Down: Causes & Fixes | Royal King Seeds
Cannabis leaves curl down due to overwatering, heat stress, nitrogen toxicity, or root problems β fix it by checking soil moisture, temps (65β85Β°F), and feeding schedules within 24β48 hours.
How to LST Cannabis Plants Week by Week | Royal King Seeds
LST (low-stress training) starts at week 2-3 of veg, uses soft ties to bend the main stem horizontal, and can increase yields by 20-40% by creating an even canopy with 6-12 bud sites instead of 1.
Granddaddy Purple Seeds: The Complete Buying & Growing Guide for US Growers | Royal King Seeds
Granddaddy Purple seeds: lineage, terpene profile, yield, flowering time, indoor and outdoor grow tips, harvest window, and the strains that compare to GDP. Discreet US shipping with 95% germination guarantee.
How Long Does It Take to Grow Weed? | Royal King Seeds
How long does it take to grow weed? Get exact timelines by stage, strain type & setup so US growers can plan their first or next harvest confidently.
What Cannabis Leaves Tell You | Royal King Seeds
Learn what cannabis leaves reveal about your plant's health. Spot deficiencies, stress signals, and fixes fast. Essential guide for US growers.
Aeroponics Cannabis Growing Guide, Yields, Setup, Strains
Aeroponics cannabis growing guide: how aeroponics works, yield comparison vs soil and hydro, system setup, best strains, and what experienced US growers report.
π§Germination
Seed starting & seedling care
Cannabis Seedling Stage Mastered in 3 Steps | Royal King Seeds
Master the cannabis seedling stage in 3 proven steps. Protect your young plants, avoid rookie mistakes, and grow stronger plants from day one.
Cannabis Seedlings and Transplanting: Complete Guide | Royal King Seeds
Learn cannabis seedling care and transplanting with real grow data. Covers seedling environment, damping off prevention, transplant timing, and post-transplant recovery protocol.
Cannabis Seed Identification and Feminization: Complete Guide | Royal King Seeds
Learn to identify viable cannabis seeds, understand feminization science, and master germination methods. Discover why seed quality determines grow success from day one.
How to Germinate Old Cannabis Seeds That Won't Open | Royal King Seeds
Discover how to germinate old cannabis seeds with 80%+ success rates. Learn seed viability testing, scarification, soaking, and the paper towel method for aged seeds.
Which Seedling to Choose for Medical Cannabis.
If you are working through which seedling to choose for medical cannabis. for the first time or troubleshooting an active issue, this guide covers theβ¦
How and When to Transplant Cannabis Seedlings.
affects the final yield and flower quality more than most growers realize. The growers who consistently produce top-shelf results manage how when to transβ¦
π‘Indoor Growing
Lights, tents, airflow & feeding
VPD & Humidity Control for Cannabis Grows | Royal King Seeds
Master VPD and humidity control for every cannabis growth stage. Covers VPD math, stage targets, dehumidifier selection, and a dial-in protocol for maximum yield.
Cannabis Growing Lights and Phases: LED, HPS, and PAR Targets | Royal King Seeds
Learn cannabis grow light selection, PAR targets by stage, and light cycle management. Compare LED vs HPS and discover the spectrum science that drives yield and potency.
Medical Strain Analysis: Moonlight.
affects the final yield and flower quality more than most growers realize. The growers who consistently produce top-shelf results manage medicalβ¦
Will LED Lights Produce More Yield Than HPS Lights?
affects the final yield and flower quality more than most growers realize. The growers who consistently produce top-shelf results manage will led lightsβ¦
Best Type of Grow Lights for Cannabis Plants.
is one of those cultivation fundamentals where surface-level understanding produces surface-level results. Why This Matters More Than Most Growersβ¦
Sunlight Hours for Outdoor Cannabis Plants
Practical guide to sunlight hours for outdoor for American growers, what to do, what to avoid, and the specific decisions that separate a good harvestβ¦
βοΈOutdoor Growing
Climate, pests & photoperiods
Stratification: Reviving Dormant Cannabis Seeds with a
Cannabis tolerates cold better than most growers expect, but there are hard limits, and the consequences of hitting them range from extended floweringβ¦
Cannabis in Cold, Wet Climates: 3 Best Mold-Resistant
Cold-climate cannabis growers: 3 strains hand-picked for rainy, humid, sub-60Β°F regions. Mold resistance, finish time, and yield data for the toughestβ¦
Indoor vs. Outdoor Medical Cannabis Growing.
Matching cannabis genetics to your growing environment is the highest-use decision you make before a seed goes into soil. A grower who selects strainsβ¦
9 Cold-Hardy Seeds for Northern Winters & Cool Rooms
Cannabis tolerates cold better than most growers expect, but there are hard limits, and the consequences of hitting them range from extended floweringβ¦
Best Seeds for Desert Conditions
The assumption that more sun equals more yield falls apart above 95Β°F, where photosynthesis efficiency drops, stomata close, and the plant enters survivalβ¦
8 Heat-Tolerant Seeds for Hot Garages and Atticts
The assumption that more sun equals more yield falls apart above 95Β°F, where photosynthesis efficiency drops, stomata close, and the plant enters survivalβ¦
β‘Autoflower Guides
Auto-specific growing advice
π§¬Strain Guides
Reviews, comparisons & picks
Best Autoflower Strains for Zones 5 & 6 | Royal King Seeds
The best autoflower strains for USDA Zones 5 & 6 finish in 70β85 days, tolerate nights below 50Β°F, and harvest by late September β Northern Lights Auto and Blueberry Auto lead the ranking.
Northern Lights vs OG Kush: Best Indica | Royal King Seeds
Northern Lights finishes in 45β50 days of flower with 18β22% THC and very high mold resistance β OG Kush takes 55β63 days with 20β26% THC but needs careful humidity control. Here's which wins for home growers.
Black Weed: Best Black Cannabis Strains | Royal King Seeds
Black cannabis strains like Black Tuna, Black Domina, and Black Mamba get their dark purple-to-black color from anthocyanin pigments, delivering 22β28% THC with heavy indica effects and dense resin.
Skunk Weed Explained: Beginner's Guide | Royal King Seeds
Discover what skunk weed really is, why it smells so strong, and how skunk strains became the backbone of modern cannabis. Beginner's guide by Royal King Seeds.
Amnesia Strain Review, Effects, THC, Yield & Where to Buy Seeds
Amnesia strain review: effects, THC %, terpene profile, growing tips, and yield data. Plus where to buy Amnesia cannabis seeds in the USA with discreet shipping.
Allen Wrench Strain Review, Effects, THC, Genetics & Seeds
Allen Wrench strain review: lineage, THC %, terpene profile, grow data, and where to buy Allen Wrench cannabis seeds in the USA with discreet shipping.
π§ͺNutrients & Soil
Feeding, pH & deficiencies
Cannabis Nutrient Deficiencies: Identify & Fix | Royal King Seeds
Cannabis nutrient deficiencies show as yellowing, spots, or curl within 3-7 days of onset. The 7 most common are nitrogen, phosphorus, potassium, calcium, magnesium, iron, and zinc β each with distinct leaf symptoms and targeted fixes.
Watering Cannabis: How and When to Do It Right | Royal King Seeds
Water cannabis when the top 1β2 inches of soil are dry and pots feel light, typically every 2β3 days indoors. Use pH 6.0β7.0 water at 65β75Β°F and soak until 20% runoff for optimal root health.
How To Water Cannabis Plants: Full Guide | Royal King Seeds
Learn exactly how to water cannabis plants for maximum yield. Avoid overwatering, underwatering & root rot. Expert tips for US growers at every stage.
Cannabis pH Guide: Why It Makes or Breaks Grows | Royal King Seeds
Learn how pH affects cannabis plants, what levels to target in soil vs. hydroponics, and how to fix lockout fast. Essential guide for US home growers.
Cannabis Nutrient Burn and Light Stress: Fix It Fast | Royal King Seeds
Learn to identify and fix cannabis nutrient burn and light stress with real grow data. Covers symptom diagnosis, EC correction, light distance, and recovery protocols.
Hydroponic Cannabis Cultivation: Systems, Setup, and Results | Royal King Seeds
Learn hydroponic cannabis cultivation with real grow data. Covers DWC, coco, NFT, and flood-and-drain systems, reservoir management, and pH/EC protocols for maximum yields.
π§Troubleshooting
Pests, diseases & fixes
Cannabis Pistils Explained for Growers | Royal King Seeds
Learn why cannabis pistils matter for growers, how to read color changes, time your harvest, and boost yields. Expert tips for US growers.
Cannabis Flowering Phase: Complete Guide | Royal King Seeds
Master the cannabis flowering phase with our complete guide. Learn timelines, light schedules, nutrients & signs of peak ripeness for US growers.
Cannabis Flowering Stage Week by Week Guide | Royal King Seeds
Follow the cannabis flowering stage week by week with real grow data. Covers stretch, bud formation, trichome timing, feeding, and when to harvest for maximum potency.
Cannabis Pest Management: IPM Guide for Every US Grower | Royal King Seeds
Learn to identify, prevent, and eliminate cannabis pests with integrated pest management. Covers spider mites, fungus gnats, aphids, botrytis, and powdery mildew.
Neuroprotective Effects of Cannabis Flavonoids.
If you are working through neuroprotective effects of flavonoids. for the first time or troubleshooting an active issue, this guide covers the specificβ¦
Pest and Disease Management in Medical Cannabis.
Pest Disease Management Medical Cannabis. affects the final yield and flower quality more than most growers realize.
βοΈHarvest & Curing
Trichomes, drying & storage
How to Cure Cannabis the Right Way | Royal King Seeds
Curing cannabis takes 2β8 weeks in sealed glass jars at 60β65% RH and 60β70Β°F, burping daily for week 1 locks in terpenes, potency, and smooth smoke.
How to Dry & Cure Weed: Expert Tips | Royal King Seeds
Learn how to dry and cure weed properly with a widely-recommended protocol. Expert tips on temperature, humidity, burping schedules, and the science behind a perfect cure.
How to Dry and Cure Cannabis for Best Results | Royal King Seeds
Learn how to dry and cure cannabis correctly. Step-by-step drying and curing guide with temperature, humidity, and timing data from published research for maximum flavor and potency.
Cannabis Storage and Curing: Preserve Potency and Flavor | Royal King Seeds
Learn how to dry, cure, and store cannabis to preserve terpenes and THC. Covers ideal humidity, containers, curing timelines, and common mistakes that destroy quality.
Cannabis Trichomes and Harvest Timing: Peak Potency Guide | Royal King Seeds
Learn to read cannabis trichomes for perfect harvest timing. Covers milky, amber, and clear stages, the tools you need, and how timing shifts cannabinoid ratios.
Cannabis Harvesting and Curing: Complete Guide | Royal King Seeds
Learn cannabis harvesting and curing with real grow data. Covers trichome timing, wet vs dry trim, drying protocols, and jar curing for maximum potency and terpene expression.
βTraining & Pruning
LST, topping & canopy work
Cannabis Pruning and Topping: Complete Training Guide | Royal King Seeds
Learn cannabis topping, LST, and SCROG with real grow data. Discover which training technique maximizes yield for your setup, strain, and experience level.
Medical Strain Analysis: Canna-Tsu.
affects the final yield and flower quality more than most growers realize. The growers who consistently produce top-shelf results manage medicalβ¦
Medical Strain Analysis: Cheesequake.
Practical guide to medical straanalysis: cheesequake. for American growers, what to do, what to avoid, and the specific decisions that separate a goodβ¦
Cannabis Strain Analysis: Space Candy.
If you are working through straanalysis: space candy. for the first time or troubleshooting an active issue, this guide covers the specific fixes thatβ¦
Medical Strain Analysis: Sweet Pure CBD.
Practical guide to medical straanalysis: sweet pure cbd. for American growers, what to do, what to avoid, and the specific decisions that separate a goodβ¦
CBD PH Haze - Strain Information
CBD PH Haze - StraInformation affects the final yield and flower quality more than most growers realize. What Actually Causes Most CBD PH Haze -β¦
π¬Terpenes & Effects
Cannabinoids, flavors & science
Germany's decision to legalize marijuana is anticipated
Cannabis for pain and inflammation is a topic where careful language matters. We are cultivators and seed specialists, not medical professionals.
The Difference Between Delta 8, 9, And 10 THC.
Understanding the difference between delta 8, 9, 10 thc. beyond surface-level descriptions helps growers choose genetics more precisely and consumers setβ¦
The Role of Myrcene in Medical Cannabis.
Terpenes are the reason two strains at 22% THC can feel completely different, and the reason why reducing cannabis to a THC percentage misses most of whatβ¦
Delta-8-THC in Medical Cannabis.
Understanding delta-8-thc medical cannabis. beyond surface-level descriptions helps growers choose genetics more precisely and consumers set realisticβ¦
CBN (Cannabinol) in Medical Cannabis.
Understanding cbn (cannabinol) medical cannabis. beyond surface-level descriptions helps growers choose genetics more precisely and consumers setβ¦
CBD Oil for Epilepsy: Benefits, Effectiveness, Dosage.
Cannabis for pain and inflammation is a topic where careful language matters. We are cultivators and seed specialists, not medical professionals.
π§¬Genetics & Breeding
Phenotypes, cloning & seeds
Pollinated Female Cannabis Plant Signs | Royal King Seeds
Learn exactly how to tell if your female cannabis plant has been pollinated, signs, symptoms & what to do next. Essential guide for US home growers.
Cannabis Cloning: Complete Guide from Cut to Rooted Clone | Royal King Seeds
Learn cannabis cloning from cut to rooted clone with real success rates. Covers mother plant selection, cutting technique, rooting media, humidity, and clone market evaluation.
How to Clone Medical Cannabis Plants.
If you are working through how to clone medical . for the first time or troubleshooting an active issue, this guide covers the specific fixes thatβ¦
Growing Cannabis from Seed VS from Clones.
If you are working through growing from seed vs from clones. for the first time or troubleshooting an active issue, this guide covers the specific fixesβ¦
What is Cannabis Pollen?
affects the final yield and flower quality more than most growers realize. The growers who consistently produce top-shelf results manage what is pollen?
Differences of Cannabis Clones versus Seeds.
If you are working through differences of clones versus seeds. for the first time or troubleshooting an active issue, this guide covers the specific fixesβ¦
Strain Education
In-depth strain reviews with grow data, effects, and terpene profiles.
Best Autoflower Strains for Zones 5 & 6 | Royal King Seeds
The best autoflower strains for USDA Zones 5 & 6 finish in 70β85 days, tolerate nights below 50Β°F, and harvest by late September β Northern Lights Auto and Blueberry Auto lead the ranking.
Strain ReviewNorthern Lights vs OG Kush: Best Indica | Royal King Seeds
Northern Lights finishes in 45β50 days of flower with 18β22% THC and very high mold resistance β OG Kush takes 55β63 days with 20β26% THC but needs careful humidity control. Here's which wins for home growers.
Strain ReviewBlack Weed: Best Black Cannabis Strains | Royal King Seeds
Black cannabis strains like Black Tuna, Black Domina, and Black Mamba get their dark purple-to-black color from anthocyanin pigments, delivering 22β28% THC with heavy indica effects and dense resin.
Strain ReviewSkunk Weed Explained: Beginner's Guide | Royal King Seeds
Discover what skunk weed really is, why it smells so strong, and how skunk strains became the backbone of modern cannabis. Beginner's guide by Royal King Seeds.
Strain ReviewAmnesia Strain Review, Effects, THC, Yield & Where to Buy Seeds
Amnesia strain review: effects, THC %, terpene profile, growing tips, and yield data. Plus where to buy Amnesia cannabis seeds in the USA with discreet shipping.
Strain ReviewAllen Wrench Strain Review, Effects, THC, Genetics & Seeds
Allen Wrench strain review: lineage, THC %, terpene profile, grow data, and where to buy Allen Wrench cannabis seeds in the USA with discreet shipping.
Strain ReviewAlien Rock Candy Strain Review, Indica Dominant, 22% THC
Alien Rock Candy strain review: indica-heavy effects, sweet candy terpenes, grow tips, and where to buy Alien Rock Candy cannabis seeds in the USA.
Strain ReviewAmethyst Strain Review, Sweet Indica with 18% THC
Amethyst strain review: hybrid indica genetics, mellow 18% THC effects, terpene profile, grow tips, and where to buy Amethyst cannabis seeds in the USA.
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