help me SAVE my rose geraniums!!!
I have a problem with my pelargoniums--- some of the stems are developing this part that gets weak and then turns dark causing the branch to hang limply. I dont know of this is a virus or fungus, but can someone please tell me what the cause(s) is/are and how can I treat it if there is any possible way? I thank whoever can help me x 1,000,000. the names of the affected plants are "attar of roses" and "old fashioned rose" Also, what causes the foliage to become yellow and sickly? To much/little water of fertilizer? I highly appreciate any help or advice.