Hi Ania, I'm in zone 5. At the beginning of the season for quite awhile, I had these green/petaled-type blossoms for awhile. Eventually, the butternut squash started making the yellow flowers. Maybe that's what your plant is doing?

Leave them on the vine, if the vine is live and going. Chances are they might change color. But after the vine dies pick them and keep the in a place like a garage and see what happens. Nothing else, you can cook them and see how they taste. Butternut squash is the sweetest squash/pumpkin that I know.

Lots of us tried this a few years back - and it was really good. it was those darn cookies that created a stir - where to get them - lol. Butternut Squash Lasagna Recipe courtesy Giada De Laurentiis Posted by LoriJean Recipe Summary Difficulty: Medium Prep Time: 30 minutes Inactive Prep Time: 15 minutes Cook Time: 1 hour 25 minutes Yield: 8 to 10 servings User Rating: Cook's Note: The no-boil lasagna noodles can be substituted with fresh spinach lasagna sheets. Look for fresh lasagna sheets in the refrigerated section of specialty markets. 1 tablespoon olive oil 1 (1 1/2 to 2-pound) butternut squash, peeled, seeded, and cut into 1-inch cubes Salt and freshly ground black pepper 1/2 cup water 3 amaretti cookies, crumbled 1/4 cup butter 1/4 cup all-purpose flour 3 1/2 cups whole milk Pinch nutmeg 3/4 cup (lightly packed) fresh basil leaves 12 no-boil lasagna noodles 2 1/2 cups shredded whole-milk mozzarella cheese 1/3 cup grated Parmesan Heat the oil in a heavy large skillet over medium-high heat. Add the squash and toss to coat. Sprinkle with salt and pepper. Pour the water into the skillet and then cover and simmer over medium heat until the squash is tender, stirring occasionally, about 20 minutes. Cool slightly and then transfer the squash to a food processor. Add the amaretti cookies and blend until smooth. Season the squash puree, to taste, with more salt and pepper. Melt the butter in a heavy medium-size saucepan over medium heat. Add the flour and whisk for 1 minute. Gradually whisk in the milk. Bring to a boil over medium-high heat. Reduce the heat to medium and simmer until the sauce thickens slightly, whisking often, about 5 minutes. Whisk in the nutmeg. Cool slightly. Transfer half of the sauce to a blender*. Add the basil and blend until smooth. Return the basil sauce to the sauce in the pan and stir to blend. Season the sauce with salt and pepper, to taste. Position the rack in the center of the oven and preheat to 375 degrees F. Lightly butter a 13 by 9 by 2-inch glass baking dish. Spread 3/4 cup of the sauce over the prepared baking dish. Arrange 3 lasagna noodles on the bottom of the pan. Spread 1/3 of the squash puree over the noodles. Sprinkle with 1/2 cup of mozzarella cheese. Drizzle 1/2 cup of sauce over the noodles. Repeat layering 3 more times. Tightly cover the baking dish with foil and bake the lasagna for 40 minutes. Sprinkle the remaining mozzarella and Parmesan cheeses over the lasagna. Continue baking uncovered until the sauce bubbles and the top is golden, 15 minutes longer. Let the lasagna stand for 15 minutes before serving. *When blending hot liquids: Remove liquid from the heat and allow to cool for at least 5 minutes. Transfer liquid to a blender or food processor and fill it no more than halfway. If using a blender, release one corner of the lid. This prevents the vacuum effect that creates heat explosions. Place a towel over the top of the machine, pulse a few times then process on high speed until smooth.

LOL.....thanks for asking. It's still sitting on my kitchen counter. I almost forgot about it! It has slowly been turning a bit from it's green color to more yellow. I actually baked and froze half of my yield of the "real" butternut squash, and will include this one in the last half. I will probably do it later this week or next. I'll let you know when I do! I usually bake them whole, but I think with this one I might halve it first, to save some of the seeds, in case it ends up being the sweetest squash on earth.............but I have my doubts. Thanks for asking and I'll let you know. If you never hear from me again, you'll know it was probably poisonous. ;)