Volunteer Squash with Two-Toned Fruit: A Natural Hybrid Surprise

That Mystery Vine Under the Porch

A green-and-yellow squash appeared unplanted under a porch. The cause: an animal dropped a seed from a cross-pollinated fruit—likely between an acorn squash and a yellow summer squash.

How It Happens

• Squash (Cucurbita pepo) cross-pollinate freely within species.
• Seed from a crossed fruit carries mixed genetics.
• Volunteer plants express novel trait combinations.

Commercial Parallel

'Zephyr' is a named hybrid: yellow crookneck × (Delicata × acorn) — producing the same green/yellow bicolor pattern. Your volunteer is essentially an unnamed version of this cross.

Eat it young as summer squash, or let it mature as a winter type. Either way, it's a free garden surprise.