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planting cannabis seeds in rockwool

Shred your used Rockwool cubes into fine strips before adding them to your compost pile to speed up the rate at which they release minerals into the soil.

Rockwool offers a long list of benefits to cannabis growers. Not only does it prevent pathogens from multiplying, but it helps seeds germinate and facilitates good drainage.

Is Rockwool Biodegradable?

Although they take a long time to break down, growers can shred their used blocks down as finely as possible and throw them onto the compost pile. Over time, key elements within basalt rock will leach into the compost and add a nutritional kick to your future soil.

For this key step you’ll need:

Now that you know everything about Rockwool cubes, including their pros and cons, how should you go about using them when growing weed?

another ethod that ive HEARD works is just to put in a shotglass over night, see what happens ins the seed absorbs the moisture until it pops. thats what ya want..

I don’t know where the paper towel method started, I only know that it has been around far too long. I first learned of it over 30 years ago. It’s hogwash. does it work? Most of the time, but why risk handling a delicate seed and it’s new born tap root when you can simply place the seed in any moist medium and have it germinate? If the seed germinates in a paper towel, which surely can’t sustain the seed, won’t it surely germinate in moist rockwool?

i have a Hydro set up also so i have been starting seedlings in rockwool for years.

Well-Known Member

Strains,
Whitewidow x Euforia x "Mindfuck".
Ghost of Ghana 100% equatorial sativa. (special).
Food of Gods secret strain from village of south Africa! (special).

Also, rock wool is naturally alkaline, so you’ll need to soak it in PH balanced water over night first before putting ANYTHING in it. My plants are currently in rock wool and doing great

It’s easy:
get 2 paper towels
fold them in half together
place the seeds in-between the folded area
dampen the paper towel (damp, not dripping, but not too dry either)
place the damp paper towel with seeds in a ziploc bag
put them somewhere dark for a couple days
ta-da!

seedlings in them you would not have to water for about a week maybe longer.

This is by far the best method to germinate weed seeds.

Options for starter cubes are seemingly endless, but the majority are made of either rockwool or peat.

Best Way To Germinate Weed Seeds

Next, transition them to either soil or plugs.

Do not add any nutrients to your Rockwool Cubes. The one on the left got nutrients, the other two did not.

Step 3: Provide water for your seeds by soaking your container in a tray containing about an inch of water. This allows the soil to be moistened uniformly, preventing over-watering. This also keeps the seed in the perfect place for germination to occur.