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how to germinate weed seeds in rockwool

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Great for germination

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.

Cons of Rockwool for Growing Cannabis

2. Submerge your blocks into the solution and leave them to soak for 24 hours. After a while, the alkalinity of the blocks will raise the pH of the solution. Return to the blocks once every few hours to test the solution. Re-apply the pH-down product as needed to maintain a reading of 5.5.

Second, consider wrapping a rubber band or soft garden tie around the middle of the cube to ensure it doesn’t break in half during the next grow.

As you can see, Rockwool cubes offer growers plenty of benefits, from improved aeration to pathogen prevention. However, more environmentally concerned growers choose to avoid them because of how they’re made, and what they’re made of.

So what is the best way to germinate weed seeds?

They should look like this:

Step 2: Place your seed(s) into the pre-cut holes in the plugs. Use some of the plug material to gently cover the opening.

Verdict

So what is the best way to germinate weed seeds? Read on to find out…

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.

But it also allows enough air exchange for the seed to produce a taproot and begin growing into a seedling.

If planted too deep, the energy available to the seedling won’t be enough for it to break the surface.