Physalis help please

I planted seeds in March. Lovely healthy seedlings. Potted on to large containers. Robust growth, green foliage (like baby spinach!) no sign of flowers through the summer. Now leaves have gone yellow, are curling and going brown. As far as I’m aware I haven’t over/under -watered and the light has remained constant (I haven’t moved them). Looks as if I’m losing them - which is a real shame. According to the books they’re virtually indestructible! Help!
0
Posts