Quote:
Originally Posted by ScottinAtlanta
Weigh a completely dry potting container. Weigh a completely watered contained. Weigh the watered one each day to assess evaporation rates.
When I did this, I found a few things: water can evaporate up to 90% of weight before the plants droop. It took 6-10 days to reach that point. I use Promix HP for my potting up soil.
If you are talking about a germination tray, just make sure the top is well positioned, and water before you leave. You need no more water in 5 days.
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I think I'll give this a try with the smaller cell containers I'll have plants in. The larger ones I think will be OK--but the small volume of the others is more concerning (basically the ones with lettuce and broccoli).