How to Grow OG Kush Seeds (2025 Grow Diary)

OG Kush is one of the most famous cannabis strains in the world, known for its powerful earthy-lemon aroma, relaxing body effects, and uplifting mental high. A 75% indica / 25% sativa hybrid created from Chemdawg × Hindu Kush, OG Kush packs up to 25% THC and just 0.2% CBD. Plants stay compact at 50–60 inches, flower in 8–9 weeks, and yield 1.3–1.5 oz/ft² indoors or up to 18 oz/plant outdoors, with harvests ready by the end of September.

This diary will guide you step by step through how to grow OG Kush strain for maximum flavor, resin, and potency.

OG Kush

• 75% Indica
• All-Day Smoke
• Fragrant Pine & Citrus Aroma
• Up to 25% THC

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👉 Shop OG Kush seeds at Hypno Seeds
🔗 Learn more about OG Kush strain on Leafly

Setup Checklist for Growing OG Kush Seeds

🏕️ Indoor Setup

• Tent: 2×2 ft or larger (OG Kush stays medium height)
• Light: LED 300–600W full spectrum
• Ventilation: Inline fan + carbon filter (smell is strong!)
• Airflow: Oscillating fan for circulation
• Medium: Soil or coco + perlite
• Pots: 3–5 gallon fabric pots
• Nutrients: Veg + bloom feed, Cal-Mag, optional PK booster
• Water: pH 6.2–6.6

🌞 Outdoor Notes

• Best in warm, sunny climates with dry late seasons
• Soil should be fertile and well-draining
• OG Kush benefits from staking or cages to support heavy colas

Germination: Starting Your OG Kush Grow

Use the paper towel method for reliable germination:

1. Place seeds between two damp (not soaked) paper towels.
2. Keep between plates in a dark, warm spot (70–75°F).
3. Check daily for taproot growth (24–72h typical).
4. Once ~½ inch root appears, plant root-down into your medium about ½ inch deep.

⚠️ Avoid sealed bags or containers that trap too much moisture and cause rot.

Week 1: Seedling Stage

What to Expect

• Height: 1–2 in
• Growth: Cotyledons + first serrated leaves
• Color: Bright green, compact growth

Environment Targets

• Light: 18–24h, low intensity (~24–30 in from seedlings)
• Temp: 72–77°F
• Humidity: 65–70%
• Water: Mist or small circle watering
• Nutrients: None (Cal-Mag only in coco)

Tips: Avoid overwatering; OG Kush seedlings prefer steady but light moisture.

Week 2: Early Veg

What to Expect

• Height: 2–4 in
• Growth: Broad indica leaves, stem strengthens
• Structure: Tight internodes, healthy branching

Environment Targets

• Light: 18/6 (~300 PPFD)
• Temp: 73–78°F
• Humidity: 60–65%
• Nutrients: Start light veg feed (¼ strength)

Optional: Begin gentle LST to open canopy for better light exposure.

Week 3: Veg Expansion

What to Expect

• Height: 6–10 in
• Growth: Strong root system, fuller canopy
• Leaves: 5–7 finger fans spreading wide

Environment Targets

• Light: 18/6 (~400 PPFD)
• Temp: 73–78°F
• Humidity: 55–60%
• Nutrients: Veg feed at ½ strength

Additional Info: OG Kush loves training, top once or extend LST for more bud sites.

Week 4: Pre-Flower & Final Training 🌱➡️🌸

What to Expect

• Height: 12–16 in
• Growth: Bushy with lateral branches
• Aroma: Early earthy-citrus hints

Environment Targets

• Light: 18/6 (~500 PPFD)
• Temp: 72–78°F
• Humidity: 50–55%
• Nutrients: Full veg feed

Prep: Finish LST/SCROG, prune lower growth, and prepare for 12/12 flip.

Week 5: Flower Begins 🌸

What to Expect

• Height: 18–24 in
• Growth: Stretch begins, pistils appear at nodes
• Smell: Earthy lemon profile emerging

Environment Targets

• Light: 12/12 cycle, ~600 PPFD
• Temp: 72–78°F
• Humidity: 45–50%
• Nutrients: Switch to bloom feed (higher P & K, lower N)

Week 6: Bud Sites & Trichome Development

What to Expect

• Height: 24–30 in
• Buds: Sites forming at each node
• Trichomes: Early crystal development visible
• Smell: Sharp earthy-pine and citrus

Environment Targets

• Light: 12/12 (~600–700 PPFD)
• Temp: 70–77°F
• Humidity: 45%
• Nutrients: Bloom feed + Cal-Mag support

OG Kush

• 75% Indica
• All-Day Smoke
• Fragrant Pine & Citrus Aroma
• Up to 25% THC

1+1 Free$24view product

Week 7–8: Bud Fattening & Aroma Surge

What to Expect

• Height: 30–36 in
• Buds: Dense, resin-coated colas stacking up
• Aroma: Intense, earthy-lemon with sour fuel notes
• Trichomes: Frost spreading onto sugar leaves

Environment Targets

• Light: 12/12 (~700–800 PPFD)
• Temp: 68–75°F
• Humidity: 40–45%
• Nutrients: Maintain bloom nutrients, optional terp boosters

Tips: Support heavy colas with stakes or netting.

Week 9: Ripening, Flush & Final Check

What to Expect

• Buds: Fully swollen, sticky, ready for harvest
• Pistils: 70–90% darkened
• Trichomes: Mostly cloudy, 10–15% amber

Environment Targets

• Light: Maintain 12/12 until harvest
• Temp: 65–70°F
• Humidity: 35–40%
• Water: Flush with plain pH’d water for 5–7 days

Harvest: Chop by the end of September for peak potency and flavor.

Harvest & Curing

• Dry: 60°F / 55% RH, 10–14 days in darkness
• Cure: Airtight glass jars, burped daily for first week, then weekly
• Result: Dense, resinous buds with earthy-pine, lemon, and sour notes

Final Thoughts on Growing OG Kush Seeds

OG Kush is a legendary strain for a reason: rich flavor, balanced effects, and strong yields in a compact plant. With its fast 8–9 week flowering cycle and forgiving nature, it’s a great choice for growers who want classic results without excessive difficulty.

If you’ve been wondering how to grow OG Kush strain, this step-by-step diary has you covered.

👉 Shop OG Kush seeds at Hypno Seeds
👉 Browse more Indica Seeds
🔗 Learn more about OG Kush on Leafly

FAQ: Growing OG Kush Seeds

How long does OG Kush take to flower?
8–9 weeks indoors; harvest outdoors at the end of September.

How tall does OG Kush grow?
Compact, reaching 50–60 inches.

What yields can I expect from OG Kush?
Indoors: 1.3–1.5 oz/ft²; outdoors: 16–18 oz/plant.

What effects does OG Kush have?
Happy, uplifting, and relaxing, with an earthy, sour-lemon flavor.