Viewing post #121848 by Leftwood

pardalinum said:The JIs are out in the garden. I tried a light soap solution last year and it killed my JI, almost overnight! More like a week but the effect was practically instantaneous. I'm thinking pH on that one!

Wow, were you using a heavy duty detergent like Dawn or a laundry soap?

I slightly overdid my municipal water acidification once. The only plants that were visibly harmed were Iris graminea and Iris setosa. I don't have any JI; and Ii. sintenesii, aphylla, reichenbachii, ruthenica, pumila, cristata, milesii, minutaourea, sibirica, typhifolia and few hybrid bearded types that I grow were all fine.