Advice Please! My peas and cucumber have brown spots

2:03 am in Uncategorized by Lesley

I have just started noticing that my peas and cucumber plants have leaves that are beginning to brown around the edges.  They are growing quite well, especially the peas, but even some of the older leaves are starting to curl and die.  Does anyone know how I can stop this? The lettuce, arugula, and kale all appear to be doing okay.