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germinating marijuana seeds in rockwool

3. After 24 hours have passed, fill up another bowl with 1 litre of water. Add your organic nutrient solution, fungi, and bacteria to the bowl in the quantities stated on the instructions. Soak the blocks in the solution for another two hours.

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

For one, Rockwool doesn’t contain any organic material. This means it’s immune to decomposition at the hands of mould and fungi. Rockwool is also free from heavy metals. These elements, such as lead and chromium, are highly toxic to plants, cause yellow leaves and prevent photosynthesis, and can even kill plants altogether.

Vegetative Phase

Give your plant one last prune before it enters the flowering stage. This will allow light to penetrate the canopy so each bud site can thrive.

Rockwool cubes are naturally alkaline. Because cannabis plants prefer slightly acidic soil, growers have to stabilise the pH of their cubes before sowing seeds (you’ll find out how to do this below).

Rockwool cubes provide a haven for seeds during germination. By keeping them sufficiently saturated, they provide the three key demands required for successful germination: darkness, moisture, and warmth.

Once you’ve chosen your preferred technique, use the steps below to kick off the vegetative stage:

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

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

Dirty Harry

you dont use a humidity dome for starting seeds and second rockwool cubes will not dry out. they retain allot of water, and with

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

I use the paper towel method 100 percent success rate for me, then once the little white tail pops out of the seed, then move the seeds to the 1 inch rock wool with the tail facing down in the hole then lightly put a little piece of rock wool over the hole that the seed is in.

As a hydroponics marijuana grower, you need total control over how your plants absorb water, oxygen, and hydroponics nutrients. Fact is, what you choose as the environment for your cannabis…

If the final destination for my seedlings is soil, soilless mix, or coco coir, I put the appropriate material in a JiffyPot and water them from the bottom with reverse osmosis water at 6.1 pH.

The media should be totally damp, but not soaking wet.

Don’t Drown Your Cannabis Seeds

Some people advocate putting cannabis seeds in between two wet paper towels.

Such methods force you to handle your seeds when they’ve just sprouted.

The best depth for planting marijuana seed is 3/8 th to ½ inch below the surface line.

Look here for instructions on how to condition rockwool.