In my experience, spinach transplants very poorly. I just thinned the spinach I sowed last fall to give plants more room, and after picking over the thinnings, had a pound, which made a great spinach gratinee for one. The rest of the plants are coming along fine.

Is there any chance that you mulched around the plants with something that's incompletely rotted? If that's the case, there could be nitrogen competition between the mulch and the spinach. This resolves itself, but some people will give their plants a bit of nitrogen like fish emulsion in the meantime.

Personally, I moved about 30 plants to a new spot 2 weeks ago and I'm not seeing the problem you're having. I wish I could help further. Best of luck. Spinach is good!!!!

Have you had lots of rain lately. Often yellowing leaves is due to excess water. If not, then I'd agree with giving them a good feeding but also keep in mind that spinach plants do have a limited life span and after several months these plants are quite old. It may just be their time. ;)

Dave

Yes, we've received a fair amount of rain lately. I also mulched with shredded leaves...I guess that is a mistake, re: the nitrogen competition?

I'll let things dry out a bit and then hit it with some fish emulsion.

thanks for the insight.