How deep in the hydroton should I put my rockwool

Just wondering how deep in the rockwool I should put plant wondering if that's ok the water comes right up to the bottom of the cube

IMO, more important is how high the cube/plug is above the water level.

Grizzlychip said:

Just wondering how deep in the rockwool

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Assuming you mean hydroton here. I'd keep some space between the waterlevel and the bottom of rooting plug. you might have to hand water/top feed until the roots hit the "res". But the space between the water level and the plug (and later on, the net pot/root mass, depending how low you let the water go) will develop air roots.

Don't have it touching the water, an inch or two gap should be good. Hope that helps. Been a little while.