Pumpkins are rotting on the vine

Asked August 7, 2017, 10:30 AM EDT

I have planted a pumpkin patch for the first time.. I have plenty of blossoms but about half fall off before they fruit. When I do get a baby pumpkin they are rotting . Any idea what I am doing wrong? Thx

Harford County Maryland

1 Response

The bloom drop can occur under high heat stress. Also, the male blossoms are there solely to provide pollen and they will drop off. Only the female blossom will remain on the plant. So, yes, you might lose half of the blossoms.

Here is additional information about poor blossom set.
https://extension.umd.edu/growit/poor-blossom-and-fruit-set-vegetables
https://extension.umd.edu/growit/vegetable-profiles-summer-squash

The rotting of the pumpkins might be due to choanephora rot, a fungal disease. https://extension.umd.edu/growit/choanephora-rot
Pumpkins are also susceptible to other fruit rot diseases. We recommend growing disease resistant varieties. Cornell University is a good resource for identifying varieties that have disease resistance.
http://vegetablemdonline.ppath.cornell.edu/Tables/Cucurbit_pumpkins%20table2016.pdf

ckc