Funny, I have the exact same question. Sorry to piggy-back on your post but I also have a "rogue" plant that has something that looks like a melon but I don't know what kind of melon.

Both look like a cantaloupe from leaf pattern, size, and color.

The first one is a watermelon, wait until the curly cue at the intersection of the stem and vine turns completely brown then pick it. The second one looks like a cantaloupe but I'm less sure.

Sorry, but the first one is NOT a watermelon. It is some variety of Cucumis melo, not Citrullus.

The exact type won't be known until ripening. But odds are it will be something good, it most likely came from a seed out of someone's melon, perhaps out of the trash, compost, or seeds put out for the birds, likely "planted" by a squirrel, chipmunk, or mouse.

If you plant cantaloupes in a spot, do they come back next year even if you don't plant them there again? I am sure I didn't plant any cantaloupe in that spot this year but I did last year.

Magic garden.

Whatever they are...I'm thinking "awesome"!

If they end up netted they're muskmelons. Anything netted is a muskmelon! Canteloupes (and some muskmelons) are not netted. Most "canteloupes" you see in stores are mislabeled. I guess the name 'muskmelon' doesn't sell very well. They're still several weeks from ripening.

edweather - what do you mean by "netted"?

As they get closer to maturity, most muskmelons develope what looks like a net-like covering on the surface. Actually, on your photo, if you look closely, you can the net developing.

Hey thanks to all for the help...... I took another pix yesterday of the bottom of the fruit....So I assume from what edweather said this is netted and a muskmelon?

Not all netted melons are muskmelons, but it's some relative.

What netted melons aren't muskmelons?

In a quote from Amy Goldman's book, Melons for the Passionate Grower, on page 44 she states, "Reticulatus: Muskmelon and Persian Melon, The hallmark of this grouping of melons is the reticulated or netlike tissue that covers the rind............Muskmelon is a breed separate and apart, yet we persist in mislabeling it "cantaloupe."

Now there are some smooth skinned muskmelons too, as well as cantaloupes, but I don't know of any netted melons that aren't muskmelons, but I'm always open to learning something new.