My stock seedling are going yellow. I've recently (last week) transplanted them into new modules of fresh compost, so I don't think that can be a lack of nutrition.
Any ideas on what's wrong with them???
I'm confused - have I misunderstood something when I enlarge the picture there looks to be green algae on the surface of the compost ... were they really only potted on last week?
The compost also looks very wet and soggy. I'd cut back on the watering and give them more sunlight.
It's some of the vermiculite that moved over with the plants when I potted them on.
Thanks for the advice. I'll move them to a sunnier spot I the greenhouse, and cut back on the watering a bit!
Also, I was told on here last year to water from below, rather than above to avoid damping off, but don't let them sit in water.