I was at a plant swap and looking at just a few vegetable offerings. I picked up a pack of what I assumed were cucumber seedlings. Just one set of seed leaves per cell, a little less than an inch long.

Not til I got home did it occur to me that they might be zucchini seedlings.

How can I tell them apart? I consulted my friend gardener Google, and still don't know. I can wait for true leaves, but I couldn't tell looking at those, either.

Thanks.