lettuce in rockwool grodan

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Posted by jackblasto none (My Page) on

Sun, Jan 19, 14 at 17:46

I've started quite a bit of lettuce in small 1" grodan cubes, moving them to clay pebbles in a flood and drain hydro setup for a few weeks now. All of it doing well. In an effort to conserve rock wool I have a Question. COULD I cut these grodan cubes down in half for the seedlings to conserve rock wool? Meaning, how intensive of a substrate does a head of lettuce need for start up, since once it's a baby plant I am moving it to the clay pebbles (within 10 days). Could I cut the 1" grodan cube into a 1/2" cube, a 1/4 inch cube, etc? What is too small that it would detriment it's beginning?

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RE: lettuce in rockwool grodan

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Posted by wayne_5 6a.IN (My Page) on
Sun, Jan 19, 14 at 19:28

I don't know the answer to your question. One inch sounds about minimum size already to me.

RE: lettuce in rockwool grodan

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Posted by digdirt 6b-7a North AR (My Page) on
Sun, Jan 19, 14 at 19:50

Have you checked with the hydro growers over on the Hydroponics forum here? While I have worked some with grodan it isn't something most vegetable gardeners would have any experience with. Personally I don't even like to work with the small 1" cubes for anything much less cut them down to a smaller size.

Dave

RE: lettuce in rockwool grodan

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Posted by jackblasto none (My Page) on
Sun, Jan 19, 14 at 20:54

I didn't see a hydro forum. I'll try over there. Thank you. Sorry for posting it in the wrong forum category.

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