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Gary Mac

Feminised

Gary Mac is a sativa-dominant hybrid suited to careful organic soil grows and steady, clear effects.

Why choose Gary Mac?
  • Clear-headed uplift with steady body ease
  • Performs well in trained indoor setups
  • Rewards organic soil and careful humidity control
THC 18-22%
CBD 0.5-1%
Lineage MAC x UK Cheese
Genotype Sativa-dominant hybrid
Difficulty Moderate
Flowering 8-10 weeks
Height Medium, bushy
Yield Medium to high (400-600 g/m2 indoors)
Taste citrus, earthy, diesel
Seed Type Feminised
Climate wet Welsh valley climate
Effects uplifting, focused, mild body relaxation
Environment Indoor and outdoor

About Gary Mac

Gary Mac combines MAC terpene richness with Cheese structure to deliver a clear, uplifting high. Suited to growers who favour organic cannabis soil growing methods, it rewards attention to airflow and drainage and produces medium to large, resinous colas when kept healthy.

Grow Difficulty:

Gary Mac is moderately demanding to cultivate and needs close attention to ventilation and mould prevention. In a wet Welsh valley climate extra care with airflow and drainage reduces rot and nutrient lockouts.

Flowering Time:

Flowering completes in approximately eight to ten weeks under controlled indoor lighting. Outdoor crops typically finish towards late September to October under steady conditions.

Yield:

Yield is medium to high when growers control humidity and provide consistent light. Indoors expect around 400–600 g/m2 with proper training and feeding.

Height:

Plants reach a medium height with sturdy central colas and well-spaced branches. They respond well to topping, LST and SCROG techniques to maximise bud sites.

Environment:

Indoors Gary Mac performs well under 600–1000 µmol m‑2 s‑1 light with training to manage height. Outdoors in Lancashire choose a sheltered, well-drained spot to protect buds from persistent rain.

Climate:

Growing Gary Mac in Lancashire requires vigilant disease management because of the wet Welsh valley climate. Use raised beds, good drainage and sheltered sites to keep roots healthy and reduce mould risks.

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 buds went a bit mouldy after heavy rain, what next?
A
Verified answer
Strip affected material, improve airflow and consider moving future plants to a more sheltered microclimate with better drainage.
Common question Posted by Urbanseedbank Answered
Q
Should I top Gary Mac or let it grow single cola?
A
Verified answer
Top once early to encourage branching, then manage with LST to spread the canopy for even light penetration.
Common question Posted by Urbanseedbank Answered
Q
Which organic nutrients do you prefer?
A
Verified answer
I favour worm castings, kelp, bone meal and compost teas for steady, soil-friendly feeding.
Common question Posted by Urbanseedbank Answered
Q
How do you handle a late-season wet spell?
A
Verified answer
Use temporary covers, raise pots off the ground and increase fan circulation to protect flowers from rot.
Common question Posted by Urbanseedbank Answered
Q
Any tip for drying in a damp house?
A
Verified answer
Use a dehumidifier and small fan to keep RH stable during drying, or set up a dedicated tent with controlled ventilation.

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