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Yumbolt

Feminised

Yumbolt is a sativa-dominant hybrid known for uplifting, citrus-led buds and reliable indoor performance.

Why choose Yumbolt?
  • Uplifting sativa energy
  • Performs well under LEDs
  • Resilient in UK conditions
THC 18-23%
CBD <1%
Lineage Yumbolt x Haze
Genotype Sativa-dominant hybrid
Difficulty Intermediate
Flowering 8-10 weeks
Height Medium-tall (0.8-1.8 m)
Yield Medium to high (400-500 g/m² indoor)
Taste citrus, earthy, spicy
Seed Type Feminised
Climate variable British weather
Effects uplifting, creative, euphoric
Environment Indoor preferred, suitable outdoors in mild seasons

About Yumbolt

Yumbolt offers energetic sativa character with manageable growth and good resin production. Grown indoors under LEDs it rewards training and steady nutrition, and outdoors it does well in sheltered spots provided damp is controlled.

Grow Difficulty:

Under variable British weather Yumbolt performs best with consistent feeding and good ventilation. Growers with intermediate experience will find it forgiving but responsive to training.

Flowering Time:

Flowering typically finishes in 8 to 10 weeks under optimal conditions. Indoor growers can control timing tightly while outdoor plants may finish later if the season is cool.

Yield:

Yumbolt offers medium to high yields when trained and fed properly. Expect good resin production and dense buds from vigorous plants.

Height:

Plants are medium-tall with an open structure that favours light penetration. Indoors they stay manageable with topping and low-stress training while outdoors they can stretch toward two metres.

Environment:

Indoors in Durham Yumbolt responds particularly well to structured training under LEDs. Outdoors in Durham it benefits from a sheltered aspect and vigilant mould prevention late in the season.

Climate:

Growing Yumbolt in Durham requires attention to late-season showers due to variable British weather. Choose raised beds or well-draining pots and protect buds from prolonged damp to avoid mould.

Frequently Asked Questions

Common questions about this strain, covering growth, effects, and suitability for UK conditions.

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Choose seed quantity
Selected: 5 Seeds
£53.33 £40.00
£8.00 / seed • You save £13.33
Accepted payment methods
100% Satisfaction Guarantee • Secured Payments
Urbanseedbank Support

Questions & Answers

Customer questions and answers from the Urbanseedbank team. Submit your own question and we’ll respond after review.

5 questions Answered posts are shown first.
Common question Posted by Urbanseedbank Answered
Q
My plant is stretching too much under LEDs, what now?
A
Verified answer
Lower the lights to increase usable light at the canopy, apply topping and LST early to create an even canopy and prevent single tall leaders.
Common question Posted by Urbanseedbank Answered
Q
Leaves are showing nutrient burn, should I flush?
A
Verified answer
Reduce feed strength by 25-50% and run a plain water flush if the burn is severe; then resume with a gentler feeding schedule.
Common question Posted by Urbanseedbank Answered
Q
How often should I water potted Yumbolt indoors?
A
Verified answer
Water when the top 2-3 cm of compost is dry, which is typically every 2-4 days depending on pot size, ventilation and LED heat.
Common question Posted by Urbanseedbank Answered
Q
Best way to prevent spider mites?
A
Verified answer
Maintain stable humidity, clean the grow space regularly, and introduce predatory mites or apply approved miticides at the first sign of infestation.
Common question Posted by Urbanseedbank Answered
Q
Should I top during a short veg period?
A
Verified answer
Yes, a single top early gives more main colas without adding much extra veg time if you plan the training carefully.

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