Blossom end rot - Ask Extension
My summer squash and zucchini have blossom end rot. How do I correct that?
Knowledgebase
Blossom end rot #872510
Asked June 10, 2024, 7:17 PM EDT
My summer squash and zucchini have blossom end rot. How do I correct that?
New Castle County Delaware
Expert Response
Hello and thank you for contacting Ask Extension. Blossom end rot is caused by a calcium deficiency in the soil. To verify this you could submit a soil sample - go to this link and review the instructions: https://www.udel.edu/academics/colleges/canr/cooperative-extension/environmental-stewardship/soil-testing/
While you are waiting for the results of the test I would recommend amending the soil with calcium. You should first remove the vegetables that are showing signs of blossom end rot and then begin a consistent watering schedule. In addition to the watering schedule you should add a foliar calcium spray or amend the soil directly in the form of limestone, bone meal, or compost.
The calcium will clear up the blossom end rot and you will get healthy vegetables going forward.
Good Luck!!
Keep on Growin'!!
J.W. Wistermayer
UD New Castle County Master Gardener
While you are waiting for the results of the test I would recommend amending the soil with calcium. You should first remove the vegetables that are showing signs of blossom end rot and then begin a consistent watering schedule. In addition to the watering schedule you should add a foliar calcium spray or amend the soil directly in the form of limestone, bone meal, or compost.
The calcium will clear up the blossom end rot and you will get healthy vegetables going forward.
Good Luck!!
Keep on Growin'!!
J.W. Wistermayer
UD New Castle County Master Gardener
