How to Grow London Pound Cake Strain (2025 Grow Diary)

London Pound Cake Strain Info

• Genetics: Sunset Sherbet × (Unknown Indica)
• Type: 80% Indica / 20% Sativa
• THC: Up to 25%
• CBD: Up to 0.10%
• Flowering: 8–9 weeks
• Height: 40–50 in
• Indoor Yield: 1.2–1.6 oz/ft²
• Outdoor Yield: 16–19 oz/plant
• Harvest: End of September
• Flavors & Aroma: Buttery berry jam, zesty citrus, sweet vanilla
• Effects: Euphoric uplift, deeply relaxing, calming

Looking for reliable Lemon Pound Cake growing tips? This diary-style guide breaks down every stage, from germination to curing, so you get the buttery, berry-rich buds you’ve been waiting for.

London Pound Cake

• 80% Indica
• Ideal for Indoor Cultivation
• Sweet Cream Aroma
• Trichome-Coated Buds
• Up to 25% THC

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Why Grow London Pound Cake?

London Pound Cake delivers on all fronts, luscious bag appeal with dense, frosty buds, a sweet & creamy terp profile, and an indica-leaning high that’s both soothing and uplifting. With a quick flowering cycle and strong yields, it’s a smart choice for growers who love flavor, speed, and quality.

Setup & Preparation Checklist

🏠 Indoor Setup Essentials

• Tent Size: 3×3 ft or larger
• Lighting: Full-spectrum LED (strong canopy penetration)
• Ventilation: Inline fan + carbon filter
• Circulation: Oscillating clip-on fan
• Containers: 3–5 gal fabric pots
• Medium: Rich soil or coco with perlite for aeration
• Nutrients: Light veg feed → switch to bloom + PK boosters in flower
• Climate Targets:
  • Veg: 70–78°F / 55–60% RH
  • Flower: 68–75°F / 40–50% RH

🏝️ Outdoor Setup Tips

• Best Climate: Warm, consistent sunlight under sunny skies
• Site: Well-drained, nutrient-rich soil
• Support: Use stakes or trellis, buds get dense and heavy
• Humidity Control: Watch for mold during late summer

💡 Pro Tip: Indoor growers can benefit from SCROG training to flatten the canopy and maximize yields. Outdoor growers do well by giving the plant room and ensuring ample support.

Conditions for Growing London Pound Cake Strain

Week 1–2: Germination & Seedling

Your London Pound Cake seeds should sprout within 24–72 hours using the paper towel method (between two plates, damp towels, warm dark spot at 72–78°F / 22–25°C). Once the taproot is visible, place them into a light, airy medium like seedling soil or starter cubes.

• Light Schedule: 18/6 | LEDs 24–30″ above canopy
• Temperature: 72–77°F (22–25°C)
• Humidity: 70–80% for germination, 65–70% for seedlings
• Watering: Just a few drops around the base; keep soil moist but never soggy
• Nutrients: None yet, seedlings feed off their cotyledons

By the end of week two, expect seedlings to show 2–3 sets of serrated leaves and stand a few inches tall. Stems will be delicate, so keep airflow gentle to help them strengthen without stress.

👉 Pro Tip: A clear humidity dome or even a plastic cup over seedlings works well if your RH is low.

Week 3–4: Early Vegetative Growth

By now your London Pound Cake has strong roots and is ready to stretch into early veg. This stage is about building structure while keeping her healthy and compact.

• Light Schedule: 18/6 | increase intensity (400–600 PPFD) | keep lights 18–24″ above canopy
• Temperature: 72–78°F (22–26°C)
• Humidity: 60–65%
• Watering: ~200–400 ml every 2–3 days (water when topsoil is dry)
• Nutrients: Begin with ¼ to ½ strength veg feed (Nitrogen-rich) + Cal-Mag support

Training

This is the perfect time to start Low Stress Training (LST). Bend the main stem gently and tie it down to allow more light penetration. This spreads out growth, setting up multiple bud sites.

👉 Want details? See our full guide: How to Do Low Stress Training (LST): Step by Step.

What to Expect

• Height: 6–12″
• Appearance: Broad indica-leaning leaves with short internodes
• Goal: Build a strong, wide plant base for heavy colas later

Week 5–6: Veg Expansion & Pre-Flower Prep

Your London Pound Cake is now showing her indica dominance, thick, bushy growth with strong branches ready to hold heavy colas. This stage is all about maximizing canopy space and prepping for the flower flip.

• Light Schedule: 18/6 | increase intensity to 600–750 PPFD
• Temperature: 70–78°F (21–25°C)
• Humidity: Drop to 55–60% to toughen plants for flower
• Watering: 400–600 ml every 2–3 days | don’t let pots stay soggy
• Nutrients: Move to full-strength veg feed + Cal-Mag; keep nitrogen high until the flip

Training

• Continue LST and consider topping above the 4th–5th node for more colas
• Light defoliation (remove large fan leaves blocking bud sites)
• Set up a trellis net or stakes if growing indoors, her buds will get dense

What to Expect

• Height: 12–20″ indoors by the end of veg
• Appearance: Bushy, wide canopy with strong branching
• Goal: Even out the canopy, strengthen stems, and prepare for explosive flower stretch

👉 Pro Tip: Make sure your tent is light-proof before switching to 12/12, light leaks can mess with flowering.

Week 7–9: Flowering Begins

You’ve flipped to 12/12, and London Pound Cake now shifts from leafy growth to bud stacking. This is when her sweet lemon-cake terps first start to appear.

• Light Schedule: 12/12 | keep intensity high (800–1000 PPFD)
• Temperature: 68–77°F (20–25°C)
• Humidity: Drop to 45–50% for safe flowering
• Watering: Plants drink more, water every 2–3 days as needed
• Nutrients: Switch to bloom feed, reduce nitrogen, increase phosphorus & potassium

What to Expect

• Week 7: Stretch phase, plants may nearly double in size
• Week 8: Pistils and small budlets appear at every node
• Week 9: Buds swell, white hairs cluster, trichomes start forming

Training

• Stop topping, only light LST if needed to keep the canopy even
• Light defoliation for airflow and light penetration
• Install a fan under the canopy to reduce mold risk

👉 Pro Tip: London Pound Cake buds get dense, strong airflow now prevents headaches later.

Week 10–11: Mid to Late Flower

This is the moment your London Pound Cake shines, buds fatten, trichomes stack up, and the sweet lemon–berry–vanilla cake aroma fills your grow room.

• Light Schedule: 12/12 | keep intensity stable, avoid heat stress
• Temperature: 67–75°F (19–24°C) | cooler nights help bring out colors
• Humidity: Drop further to 40–45% to keep those dense buds safe
• Watering: ~600–800 ml every 2–3 days | monitor runoff EC to avoid salt buildup
• Nutrients: Full bloom feed with PK booster | keep nitrogen minimal

What to Expect

• Week 10: Buds harden, trichomes spread across sugar leaves
• Week 11: Pistils begin darkening and curling in; resin aroma peaks
• Appearance: Chunky, frosty colas with hints of purple under cool nights

Grower Tips

• Defoliate very lightly to avoid shading, don’t stress her now
• Stake or net heavy branches, London Pound Cake colas can topple under their own weight
• Check trichomes daily to prepare for harvest timing

👉 Pro Tip: Target trichomes that are mostly cloudy with some amber for that balanced euphoric + relaxing effect.

Week 12: Harvest & Curing

Your London Pound Cake is ready for chop! At this point, trichomes should be mostly cloudy with 10–20% amber, signaling peak potency and flavor. The aroma will be unmistakable, a mix of sweet lemon cake, berry jam, and creamy vanilla.

Harvest Steps 🌿

• Cut branches early in the morning (or at lights off) for max terpene retention.
• Trim fan leaves right away; decide on wet vs dry trim depending on your preference.
• Hang branches upside down or use drying racks in a dark space.

Drying Conditions 🌬️

• Temp: 60–65°F (15–18°C)
• RH: 50–55%
• Duration: 7–10 days, until stems snap rather than bend.

Curing 🫙

• Place buds into airtight glass jars, filling about 70–75%.
• Store in a cool, dark place at 60–65°F / 58–62% RH.
• Burp jars daily for 10–15 minutes during the first 2 weeks, then less often.
• Cure for at least 3–4 weeks for smoother smoke and max terpene development.

Yields 🌱

• Indoor: 1.2–1.6 oz/ft²
• Outdoor: 16–19 oz/plant

👉 Pro Tip: A slow cure transforms London Pound Cake’s flavor into a true dessert — smooth, citrusy, and creamy with long-lasting effects.

Final Thoughts on How to Grow London Pound Cake Strain

Learning how to grow London Pound Cake strain is all about balance: steady feeding, careful training, and tight humidity control in flower. With her 8–9 week bloom time, frosty, lemon-vanilla buds, and up to 25% THC, she’s a rewarding strain for growers who want both flavor and potency in one package. Indoors she delivers dense, resinous colas, while outdoors she rewards with hefty yields by late September.

👉 Ready to grow your own? Shop London Pound Cake seeds here and bring this dessert-like powerhouse into your garden.

For more community insights and reviews on terpene profile and effects, check out London Pound Cake on Leafly.

FAQs: How to Grow London Pound Cake Strain

Q: How long does London Pound Cake strain take to flower?
A: London Pound Cake strain flowers in about 8–9 weeks, with harvest usually ready by late September.

Q: What yields can I expect from London Pound Cake seeds?
A: Indoors, London Pound Cake produces around 1.2–1.6 oz/ft², while outdoor plants can yield 16–19 oz per plant with proper care.

Q: Is London Pound Cake strain easy to grow?
A: Yes, London Pound Cake is considered grower-friendly. With stable genetics, it thrives indoors and outdoors as long as humidity is controlled during flowering.

Q: How tall does London Pound Cake strain grow?
A: Expect heights of 40–50 inches, making it manageable for both tents and gardens.

Q: What are the effects of London Pound Cake strain?
A: London Pound Cake delivers a euphoric, calming, and relaxing high, paired with dessert-like flavors of lemon, berry, and vanilla.

Q: Where can I buy London Pound Cake seeds?
A: You can buy premium London Pound Cake seeds directly from Hypno Seeds for authentic genetics and top-quality results.