I planted out some of my pumpkins a few weeks ago, with fingers crossed due to our unpredictable Michigan weather.

They appear very healthy, growing vigorously, but the leaves are all turning yellow! There is no insect damage, the leaves are not shriveling. They are getting new leaves almost daily it seems (you know how fast those curcurbits grow) and have vines starting, but the leaves gradually turned yellow. They started looking slightly orange and within a few days are completely yellow.

The plot they are in housed tomatoes last year and a week or two before planting I lightly fertilized with Garden Tone (3-4-4.) They are in raised bed.

I also put some slug killer around the seedlings when I planted them out.

Night time temps have been a little low for pumpkins, around 55.

Does this sound like something I need to remedy?