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Long (91 days plus) Cannabis Seeds
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Long indoor flowering strains are cannabis seeds that take 91 days or over, about 13 weeks, or longer.
Most of these genetics come from sativa or sativa-hybrid backgrounds, especially those from equatorial spots where the sun stays pretty constant all year and plants evolved to take their time.
Collectors who pick these seeds are drawn to the unusual genetics and exotic traits these seeds contain.
Read MoreWhat makes these strains take so long to flower
These strains sit in the long-flowering club because their genes, mostly sativa or sativa-leaning hybrids, tell them to take the slow road. Sativa-heavy seeds usually need ten to fourteen weeks to finish flowering indoors, and some pure sativas push past sixteen weeks.
That's because they come from warm, tropical places near the equator, where day length barely shifts and plants never felt the rush of an approaching winter.
Hybrids that carry sativa traits can also run long, depending on how much sativa ended up in the mix.
The upshot is a group of seeds that deliver genetics you won't find in faster strains, traits that only develop when flowering stretches out over weeks and weeks.
Standout examples of long-flowering strains
Some Haze seeds are the poster children for long flowering, with certain versions needing fourteen weeks or more indoors. Collectors know them for their layered genetics and the distinctive profiles that only emerge after all that time.
Amsterdam Amnesia is a sativa that wraps up in nine to ten weeks, shorter than the real marathon runners but still longer than most hybrids.
Desfrán, a pure jungle sativa, follows a similar nine-to-ten-week path, showing just how varied long-flowering seeds can be even within the same rough timeframe.
CBD Charlotte's Angel is a high-CBD sativa that is said to take eleven to twelve weeks indoors, proving that extended flowering isn't just for high-THC seeds. C-Vibez is a hybrid that takes ten to twelve weeks.
Jamaica Blue Mountain Landrace is a pure sativa that regularly goes past twelve weeks, holding onto genetics from its Caribbean mountain home and staying true to that slow, steady rhythm.
Pure sativas can stretch all the way to sixteen weeks indoors, marking the far end of the long-flowering spectrum. These seeds tend to spend less time in the early phase than indicas, then make up for it with a much longer bloom.
Even some indicas can surprise by running longer than expected, Barney's Pineapple Chunk, an indica clone, has been known to hit ten weeks indoors, which is unusual for that side of the family.
Long-flowering seeds often throw up a bit of variation, too, with some plants taking longer than the breeder's estimate and developing their own quirks along the way.
Long (91 days plus) Frequently Asked Questions
Any strain that needs 92 days, roughly thirteen weeks, or more to finish flowering indoors, well beyond the usual seven-to-nine-week window most seeds stick to.
Sativas evolved near the equator, where day length stays pretty steady all year, so they never had to hurry and naturally take ten to sixteen weeks to bloom.
Absolutely, hybrids with sativa in the mix often run ten to twelve weeks, depending on how much sativa ended up in their genes.
Most do, but some indica plants can also go longer than usual, occasionally hitting ten weeks or more indoors.
Pure sativas can push all the way to sixteen weeks indoors, sitting at the very top end of the long-flowering range.
Yes, individual plants from the same batch can flower a bit faster or slower, with some running longer than the breeder's guideline.
CBD Charlotte's Angel asks for eleven to twelve weeks, C-Vibez needs ten to twelve, and some Haze seeds can go fourteen weeks or beyond.
It's a pure sativa that regularly goes past twelve weeks indoors, keeping the genetics from its Caribbean mountain roots intact.
They're after the unique genetics and exotic traits that only develop when flowering stretches out over weeks, valuing quality over speed.
Most trace back to warm, tropical spots near the equator, where consistent sunlight let plants bloom slowly without any seasonal rush.