I planted some sugar pumpkins in late April to early May in solo cups. But a few weeks ago I accidentally dropped them down some steps, and they all spilled out of their cups and it was very chaotic. They all survived but I've been noticing some yellow leaves on them. They have been outside in heavy rain and aren't getting very much sun. That's because I've been keeping them under an umbrella to protect them from the rain. Does anyone know what is wrong or what I should do? I'll insert a picture of what they look like.