Someone told me that if you add potash around your plants , for the last month or 6 weeks of growing season it would make your tubers stronger and less likely to rot.

I haven't found that advice anywhere else yet, so I'm wondering if it has any validity.

What do you all think?

(Jane Cowl)

I've always heard that adding nitrogen after August will make tubers more susceptible to rot. I mostly use a balanced fertilizer. So I'm adding potash/potassium all during the year. I don't know if adding just potash alone during the last month would help anything.

That's a nice bloom!

I've never heard that about potash, but it might not hurt to test it out on a couple varieties! I usually stop fertilizing altogether after the 3rd Saturday in August, as I also have heard the theory about late season nitrogen making the tubers less hardy over Winter.