The D.C. Seed Exchange

Welcome to the D.C. Seed Exchange! We are a small seed bank focused on the highest quality genetics. Our mission is to build a virtual trading space that features genetics from the best breeders in North America as well as highlighting local talent from the Mid-Atlantic region. Below is a complete list of our vendors offering a variety of regular, feminized and auto-flowering seeds.

We are here to help, if you have any questions please don't hesitate to contact us!


Double Grape F7 3 Feminized Autoflower Seeds

(1 customer review)


Earn 38 points upon purchasing this product.

18 in stock


Genetic Heritage

Sour Stomper x Grape Crinkle

Seed Type

F7 Feminised Automatic



Cycle Time

65 to 70 days from sprout

Project Introduction and Overview
Originally part of our second Illuminauto drop, advancing to a long stint as our best selling Limited Edition ever, and now a permanent addition to our catalogue as part of our first wave Reserva release! Here’s what we said way back on her first release: ‘Another clash of the Artisanal titans in the form of the two strains of grape heritage. Sour Stomper (Sour Crack – Grape Pheno x Grape Stomper OG) x Grape Crinkle (Canadian Crinkle x Supernatural x Ripley’s OG) From the offset of our F3 Artisanal run in winter 2016 we had this cross pegged and written on our project board as a MUST DO! Insanely frosty and bursting with flavour, ideal strain for extraction!’ This was the first Illuminauto strain to sell out from the 2nd drop, we received such good feedback we just had to continue the line and make her available again.

Strain Behaviour and structure:
Double Grape is an all-around pleasure to grow. She’s easy to grow and manicure and all too easy to consume! One of our frostiest, oiliest varieties ever and Double Grape packs a punch too. She has very nice vigour and grows relatively open, bushes naturally with some leaf tucking but also will adapt very nicely to LST and other forms of training when performed correctly. The cycle time is medium at 65-70 days to bring her to fruition in ideal conditions and is definitely one of the most pleasurable strains to grow from any of our collections.

In the weeds.


55 to 80 cm


90 to 140g

Aroma and Flavour

Strong complex aroma, blending sweet and sour, grapes and gas. Tastes of a deep, rich red grape with a sweet grape pop


Potent hybrid, both stimulating and sedative depending on tolerance and consumption


Perfect extract candidate – Very High in resin, oil and terps.


21.78% THC from a random flower tested by Canna, Independent tests have seen as high as 31% total cannabinoids.

Medicinal Effect

Great for aches, pains, sleep and appetite stimulation

3 Feminized Autoflowering Seeds per pack!

1 review for Double Grape F7 3 Feminized Autoflower Seeds

  1. MOX (verified owner)

    Out of the three seeds one was green, immature and did not sprout. Another seed was very small I was able to get it to sprout but it grew very slow, finished flowering at the only 8″ in height. Third seed germinated, plant grew okay. Finished in 70 days but small yield. After month-and-a-half cure grape smell and flavor did mature. I’m giving it three stars because seeds are cheap.

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