Why are the new buds growing on our geraniums small and brown? They are...
The buds on your geraniums may have been damaged by a late frost or are damaged because of a disease called botrytis (gray mold). Simply lightly prune the plants or pinch them back to remove the damaged buds. There should be plenty of time for them regrow and produce more flower buds. See the following information from the 'plant diagnostic' section of our website, http://plantdiagnostics.umd.edu/level3.cfm?causeID=614