Winter Woes

Hi Everyone,

I've got some seedlings I've sprouted in Mushroom Compost - they sprouted well but now are showing signs fo stress - yellowing and dying leaves. They're only little.

Got it under a Viper Spectre 400w - on veg mode , with a small fan blowing the other way to have very little air on them but to keep it moving in the room.

Keeping them watered but not wet - thought I was ticking all the boxes except the temp. It's winter here, It gets down to 8 degrees celsius here (45f) so pretty chilly - they're inside but definitely not warm in the early mornings. Reckon it could be phosphorus lockout due to cooler temps ? Think that could be the issue causing this response ? The light isn't too hot and not super bright either.

Your help is really appreciated.

Cheers

CornCob

Dude, the nitrogen is spent in the compost. It’s not a very good medium for cannabis. It also looks like it’s too hot from something else. Those are going to struggle.

Thanks for your reply Hotrod - How should I level this out ? repot them ? taking out as much dirt as possible ?

Tip out one or two and gently remove soil from them, careful you don't damage roots and transplant to new soil. If it seems easy enough, do the rest.
Get some insulation in there.
Put the tray on top of some polystyrene or such.
I grow in the cold and when it gets to those temperatures I use a heatmat. They come in a variety of sizes. Warm roots is a must for better growth in cold conditions .
Make sure and water them with tepid water, not freezing cold too
If all goes well and they start perking up turn on both switches on your light. Veg and bloom.
The extra red spectrum and extra watts will give a bit more warmth to the area.