Description
Modified Grapes Feminized strain data sheet
| Genetics | GMO x Purple Punch |
|---|---|
| Type | Indica dominant hybrid (70/30) |
| THC | 22%–28% |
| CBD | Under 1% |
| Flowering time | 8–9 weeks (56 to 63 days) |
| Outdoor harvest | Late September to early October |
| Height indoor / outdoor | 90–150 cm / up to 180 cm |
| Yield indoor / outdoor | 450–600 g/m² / 500–700 g per plant |
| Difficulty | Moderate |
| Climate | Temperate to warm; humidity 40% to 45% late in flower; cool nights for colour |
| Best for | Grape and gas flavour, evening use, extracts |
Modified Grapes Feminized at a glance: Modified Grapes is a 70/30 indica leaning cross of GMO and Purple Punch that flowers in 8 to 9 weeks, tests 22% to 28% THC, grows 90 to 150 cm indoors and yields 450 to 600 g/m² of dense, olive and lavender buds with a grape candy, garlic and fuel aroma.
Ready around Canadian Thanksgiving, ordered well before the leaves turn
Modified Grapes finishes between late September and the first week of October, so in most of southern Canada the harvest lands near the Thanksgiving long weekend. Getting there starts with seeds in hand by April. Ours ship from our Vancouver, BC seed bank in plain packaging and reach every province in 3 to 7 business days, never crossing a border. Each batch is viability tested before it ships and covered by our 80% germination guarantee, and the 10 and 25 seed packs are buy one get one free.
Where Modified Grapes comes from
Modified Grapes is a cross of GMO, the Chemdawg and Girl Scout Cookies strain known for its garlic, mushroom and onion funk, and Purple Punch, the Larry OG and Granddaddy Purple dessert indica that tastes like grape candy. It appeared in California in the late 2010s and quickly built a following among people who wanted the depth of GMO with something sweet on top.
The name appears to be a play on its parents: GMO is short for genetically modified organism, and Purple Punch supplies the grapes. No breeder has published an official explanation, but the joke is hard to miss. The original release was not widely available as feminized seed, which is part of why the strain spread mainly through clones and why feminized versions are in demand.
Purple Punch also shortens the bloom. Where GMO often needs 9 to 10 weeks, Modified Grapes finishes in 8 to 9, which changes where it can be grown outdoors in Canada.
Modified Grapes strain effects and experience
The first half hour is warm and happy, with a gentle euphoria and an easy, talkative mood. Then the body effect takes over: heavy limbs, a strong urge to sit down and, for many people, sleep within two to three hours. It is an evening strain through and through.
At 22% to 28% THC it is potent, and the GMO side gives it staying power. Smaller amounts keep the happy, relaxed phase without the couch lock; larger ones go straight to the heavy end.
Modified Grapes flavour, aroma and appearance
The nose is a genuine collision. Sweet grape candy and berry arrive first, then garlic, diesel and a peppery, musky funk rise underneath. Some people describe it as overripe grapes on a garage floor, and they mean it as praise. The smoke is sweet grape and honey on the inhale with gas, spice and pine on the exhale. Caryophyllene is always prominent, with limonene and myrcene alongside.
The buds are dense, medium sized and chunky, olive to forest green marbled with lavender and deep purple, with orange-amber hairs and a heavy coat of frost. The purple is strongest when nights fall to 12 to 15 degrees in the last two weeks.
Growing Modified Grapes in Canada
Indoors
Modified Grapes grows as a medium, sturdy plant with more stretch than Purple Punch and less than GMO, usually 1.5 to 2 times after the flip. Veg for three to four weeks and flip at 45 cm to finish between 90 and 150 cm. It takes a moderate to heavy feed in mid flower. Keep days at 23 to 27 degrees and hold humidity at 40% to 45% from week six, because the buds are dense enough to hide rot. A 5 to 7 degree drop between day and night in the final fortnight brings out the lavender. The smell in late flower is loud, so plan your carbon filter before you germinate; our guide to controlling cannabis odour covers the options.
Outdoors, by region
The 8 to 9 week finish opens up most of southern Canada. On Vancouver Island, in the Lower Mainland and in the Okanagan, plant out in late May for a harvest at the end of September. In southern Ontario, a late May transplant finishes in early October; give plants space, as the dense colas do not forgive a humid spell. On the Prairies, start indoors in early April and transplant in late May for a harvest in the last days of September, and keep frost cloth handy. In the Maritimes, a warm, sheltered site and good drainage are essential. Remember that the odour will carry to neighbours in September.
Height and training
Top once or twice and use a net to spread the canopy; the GMO side can push a tall central stem if left untrained. Lollipop the lower branches at the flip and thin the inner fan leaves at week three of flower to keep air moving through the dense buds.
Flowering and harvest cues
Trichomes turn cloudy around day 55 to 60. Harvest at mostly cloudy with 10% to 15% amber for the full, heavy effect. Dry for 12 to 14 days at 60% humidity; the grape comes forward and the garlic softens over a cure of three weeks or more.
Modified Grapes yield indoors and outdoors
Indoors, 450 to 600 g/m² is realistic from a trained canopy, and the buds are heavy for their size. Outdoors, a full-season plant gives 500 to 700 g dried. Resin production is high, which makes it popular with rosin pressers, and the terpene mix survives extraction well.
Who Modified Grapes is for, and who should pick something else
Grow Modified Grapes if you love GMO but need a faster finish, if you enjoy sweet-and-savoury flavours, or if you want a potent evening strain that colours up in a Canadian autumn.
Pick something else if you cannot control odour, if you want a mild or daytime strain, or if you prefer pure dessert sweetness, where Purple Punch on its own is the better fit.
How Modified Grapes compares
GMO, its parent, is heavier, taller, more savoury and at least a week slower. Purple Punch is sweeter, shorter and gentler. Grape Gas offers a similar grape and fuel pairing without the garlic. Mule Fuel, another GMO child, keeps the garlic and diesel but trades the grape for earth. Among our indica feminized seeds, Modified Grapes is the one that brings sweet and savoury together.
Frequently asked questions about Modified Grapes
What strain is Modified Grapes?
Modified Grapes is an indica dominant hybrid bred from GMO and Purple Punch. It combines grape candy sweetness with GMO’s garlic and diesel funk, tests 22% to 28% THC and finishes in 8 to 9 weeks of flower, faster than GMO on its own.
Is Modified Grapes indica or sativa?
Modified Grapes is indica dominant, usually rated around 70% indica. It begins with a happy, relaxed lift and then turns into a heavy body effect that often ends in sleep, so it suits the evening. The plant grows medium height with dense buds.
How strong is Modified Grapes?
Modified Grapes usually tests between 22% and 28% THC, with CBD below 1%. It is potent and long lasting thanks to its GMO parent. Smaller amounts give a warm, happy calm, while larger ones lead to strong couch lock.
What does Modified Grapes taste like?
Modified Grapes tastes like grape candy and berry on the inhale, followed by garlic, diesel, pepper and pine on the exhale. The sweetness comes from Purple Punch and the savoury funk from GMO. A cure of three weeks or more softens the garlic and lifts the grape.
Why Modified Grapes is the GMO cross for growers who cannot give ten weeks
GMO is a great plant, but a 9 to 10 week bloom rules it out of most Canadian gardens. Modified Grapes keeps much of that character and finishes a week or more sooner, which is why we suggest it to growers outside the BC coast. Seeds ship from our Vancouver, BC seed bank in plain packaging and arrive in 3 to 7 business days. Orders over $200 ship free, and a $30 tracked and insured option adds one free reshipment if a parcel goes missing.
Every batch is viability tested in Vancouver, where we have been since 2009, and the 80% germination guarantee covers your pack when you follow our germination guide. Modified Grapes comes in 5, 10 and 25 seed packs; the 10 and 25 packs are buy one get one free with any strain of the same size, so a pack of GMO for an indoor tent and Modified Grapes for the garden can share one order. Over $420, we add 10 free seeds.
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