Claustrum Marijuana is the best Sativa from Positronics Seeds. It is very vigorous producing huge amounts of clones. It has an incensed aroma and a power that leaves amazed even the most regular smokers.

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Feminized Claustrum Marijuana Seeds

Claustrum is a sativa Marijuana strain, a truly masterpiece plant, created by crossing Kali Mist, Super Silver and Jack Herer. In more detail, Kali Mist was initially crossed with Super Silver Haze and the best specimen was selected. This selected specimen was crossed with Jack Herer to create Claustrum, a sativa Marijuana harboring the best sativa genome in the world.

The plant is very tough surprising even the most experienced growers. In a growing room the plant is small not excedding one meter high but in the garden and with a good substrate this specimen can reach.... 5 meters high!

It develops a fir-like structure with good internodal distance and very homogenous distribution of branches that allows the development of aerated buds. It produces few but very large leaves and a huge amount of clones covered with long hairs during the flowering period.

You will notice that it consumes a lot of fertilizers. During the last 2 weeks of flowering we recommend to give it the maximum possible light. In optimal conditions, Claustrum will offer productions of half kilo per square meter in a growing room and after 80 days and atround 600g per plant in the garden to be collected in early November.

The name Claustrum comes from its aroma, an intense and incensed fragrance that becomes more strong when smoking it and intensely reminescent of the characteristic smell present in a cloister or in a medieval church. The presence of the incense is maintained in the taste and in the mouth you will also feel refreshing hints of eucalyptus and pine, staying for a long period of time. Its effect is euphoric, very stimulating and quite psychedelic so we recommend to consume it in moderation, specially when you are partying and having fun.

Features of Claustrum Marijuana:

  • Feminized
  • Indoor/Outdoor
  • Genotype: sativa
  • Genetics: Kali Mist x Super Silver Haze x Jack Herer
  • THC: 21%
  • CBD: 0.1%
  • Flowering: 80 days (indoor) or early November (outdoor - northern hemisphere)


Now on in your orders you will receive even more gifts, in addition to the free seed every 30€ you will also receive one or more of these gifts: lighter, grinder, beach bag, t-shirt and cap.

How to play "Find your gift" game.

To participate you only have to find and icon with our promotional gifts in the products pictures. Browse our website and look at product pictures until you find the icon where you can see the gifts, share that product page on Twitter with #regaloexperiencianatural hashtag to win all our promotional gifts! every week we will draw a lot of gifts among all those who share the right product on Twitter.