Too much sun too soon?

[mikemansker]

I have a couple of those greenhouses and I use them every year. I start plants indoors in them under a grow light. When the plants get a little bigger and the weather is a little warmer, I move everything outside on the south side of the house protected from the wind. Mine have a front panel that zips and you can roll it up to provide circulation and keep the temps down. Of course you have to use your head. I have a few trays that I can move inside if it's going to be too chilly at night.

Plants will also dry out pretty quickly, so you need to keep up with watering.

[ilex]

Originally Posted by loulac

Up to now I hated rockwool, a synonym for heavily industrialized greenhouses. but as only stupid people never change their minds I'm ready to give it a try next year.
I'll keep in mind the fact that rockwool never gets too hot whereas a dark potting mix in the sun can reach a very high temperature. I agree with 30°C (85° F), germination is fast. Could you tell us how you manage fertilizing ? Do you buy a readymade mix or do you prepare your own ? what elements do you mix ? You will certainly help growers who can't find the right pottting mix.

No fertilizer while on rockwool.

When moved to flats, commercial potting mix, organic if I find it, conventional otherwise, some worm casting, and half perlite. No additional food added.

[ScottinAtlanta]

We Southerners harden off on our front porches - perfect shady climate with a little sunshine at the end of the day.