Sorry I can't answer your question but I wanted to grow these this year but when it came time to order them they were sold out. I may try them next year.

I've not grown that particular one, but we planted something called Dinosaur Eggs from Henry Fields this year that sounds like it might be similar. We have greatly enjoyed them. Especially like them sliced about 1/2" thick slices with some olive oil rubbed on and grilled. They have been pretty prolific, even with all the weirdness Mother Nature "gifted" us with this summer. We will be planting them again next year hoping for the same good luck as his year's crop. Hope yours do well also! (We'll have to compare notes next year!!)
Edie

Never tried the Golden Egg, have grown round yellow zucchini ( One Ball, Sun Day). Dinosaur eggs is a mix of round grey, green, yellow hybrids. Golden Egg appears physically identical to Grenade.
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I grow them this year they grew well. Still growing.