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how to germinate weed seeds in rockwool

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

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

Dirty Harry

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.

germinate them them move them to the rock wool cubes

Now that we have the Ph adjusted water, it’s time to stabilize and hydrate the Rockwool cubes in it. Insert the Rockwool Cubes into your container and let them soak for roughly 1 hour. Once the hour is up, the cubes will be big and fat with water. Take them out of the bowl of water and put them somewhere you don’t mind getting a little wet. Save the remaining water for step 3.

Depending on how hot it is (and other factors) you may need to water your cubes 1-4 times a day. Use the Ph adjusted water when doing so (that’s why I had you save the leftovers from step 2). If you already threw that water out, go make another batch of Ph adjusted water and keep it in a separate bottle or container for watering. Note: Do not over water, in fact while some say to water 1-4 times a day, I did it only once a day when I got home after work.

Important: Do not let the PH of the water go below 5. A Ph this low will damage the fibers of the Rockwool Cube

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

Using either a PH test kit or a Ph meter, determine the Ph of the water. Water comes out pretty alkaline, usually around 7.4, so you will need to acidify it a little bit to bring that Ph down to the desired level. Aim for as close to a Ph of 5.5-6 as you can get.

Get a bowl or some other container that is big enough to fill with water and have room left for your Rockwool cubes. Your average salad bowl will work fine for 3 Rockwool cubes, if you are planning on doing more than you will need a larger container.

Your marijuana plants breathe out oxygen through their leaves, while intaking oxygen from their root zone. But many cannabis growers aren’t providing enough root zone dissolved oxygen. Their plants’ roots…

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

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

Don’t Drown Your Cannabis Seeds

If they’ve been moist that long and haven’t germinated, they’re most likely not going to.

Rather than using the paper towel or submerse in water methods, this method we’ve given you to germinate marijuana seeds is direct, easy, and doesn’t require you to handle, transplant, and possibly damage a sprouted marijuana seed.

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

Old or inferior seeds can take as long as 10-11 days.