Please see my attached photos. I have 4 pots of snow pea/sugar snap about 3 weeks old, one of them the leaves turning yellow and even white. Not sure what is happening to this little plant.
It looks like drought. The plants are stunted in the middle pot. It seems to be starting in the left hand pot too, so may be something in your soil. Strange.
What do the leaves on the white one feel like ? Dry or soft and flexible ? Are you fertilizing with anything ? What soil are you using ?
I used these 4 pots previously. There are potting mix and compost, no fertilizer. 6 weeks ago I planted 4 pea plants in each pot, but in few days it was hot and those 16 plants turned yellow and white, all dead. Now I gave another go, use same pots to see how it goes. The yellow/white leaves are dry and brittle.