Wondering how to address what looks like chlorosis in both ( August) peonies and Paniculata hydrangeas. * see photos
Thank You! Jacqueline Rogers ( I live in Montreal) Email: email@example.com 514 663 3759
This appears to be iron deficiency with the typical green leaf veins and yellow between veins. Chlorosis doesn't usually have this pronounced difference between vein color and leaf color. A soil test is the only way to know for sure which deficiencies you have; pH can also affect whether the plant can take up elements like iron. If you decide to do testing yourself and not use a laboratory, follow the instructions exactly to get accurate results. Iron sulfate is a product that lowers pH (sulphur) and provides iron. Correcting these deficiencies doesn't happen quickly as soil micro-organisms are involved in the process. But supplements this fall should be noticeable in next year's growth.