Spots, Stripes and Unusual Squash Fruit
Spotted acorn squash, striped zucchini and warty pumpkins are sometimes found on volunteer plants growing in gardens and compost piles. No need to worry, most are edible but not always as tasty as the original variety.
So here is how it happens. Vine crops such as squash, pumpkins, melons and gourds produce separate male and female flowers. Each type of plant can only be pollinated by the same species.
Since summer squash, pumpkins, gourds and some winter squash are all the same species, they can pollinate each other. This doesn’t affect the fruit we harvest from seeds we purchase and plant. But the seeds of these, if cross pollinated, can grow into new plants and produce unusual fruit.
So if you save seeds, leave fruit in the garden or compost pile, the volunteer plants may produce unique fruit with characteristics of one or both of the parent plants.
A bit more information: As you harvest these distinctively different fruits try tracking down their parents. Look at last year’s garden plan to see what closely related plants may have crossed to create these fun fruit. If this is not the case, you may have a virus or other disease, causing this change in appearance.
Related
Audio
Audio
Categories
Upcoming
Events & Webinars
Sept. 11, 2026
Illinois State Master Gardener Conference
Rockford, IL
Register here
Sept. 12, 2026
2026 Knowledge in Bloom Conference
Urban Ecology Center, Milw., WI
Register here
Sept. 17, 2026
FREE WEBINAR:
Fall Landscape Care and Planting
Register here
Sept. 26, 2026
Pruning Hydrangeas & Other Shrubs
Pasquesi Home & Gardens, Lake Bluff, IL
More information
Oct. 6, 2026
Upper Midwest Invasive Species Conference
La Crosse, WI
Register here
Oct. 22, 2026
Wauwatosa Public Library
Wauwatosa, WI
More information
WATCH ON-DEMAND WEBINARS
MORE UPCOMING EVENT DETAILS


