Garlic chives are very late bloomers, typically well past the season ornamental alliums bloom, so chances of any cross pollination are minimal. And the effects of any cross pollination would only be present with any seeded offspring, not with the original plantings. btw, I have grown regular chives in close proximity to a number of ornamental alliums and have never had any crossed seedlings.

Just saving the seeds from a diverse pepper patch won't guarantee you will grow a pepper plant true to the mother plant so not a good Idea if you care. Not also a good Idea if the plant is a hybrid to save any of the seeds because you won't get a true replica to the original plant. You can isolate the plants you want to save seeds from and try to collect seeds but still doesn't mean the pepper flower wasn't pollinated by a flying pollinator moving across your garden or yard. Odds are low but still could happen. The best solution for true seeds is to bag some flowers right before they bloom and once they bloom hand pollinate and re-bag until the blossoms fall off, and then tag them. Peppers are self pollinating so you shouldn't have much of a problem. Now I know for a fact Tomato flowers are only viable for a day or two, but not sure about peppers so hand pollinate as soon as they bloom. I took seeds from a heirloom open pollinated Beaver dam plant packed in a patch with a dozen other types of pepper plants many years ago and grew them. they weren't anything like the original, the shape and size was right but flavor wasn't even close and rather nasty.

Your rose is probably a grafted rose which means that there is a commonly used root part (the rootstock) that the rose producers use for different varieties to give them perhaps hardiness, vigor, etc. The rose that you want is grafted onto the rootstock. So what probably happened is that the variety you want has died and the rootstock has taken over the growing part. Rootstocks are usually white (multiflora), red (Dr. Huey) and other colors. If you want the variety you bought, you'll have to buy it again.

Hello everyone, I have a question about cross-pollinating melons, I have a bunch of different melons growing I've been thinking about cross-pollinating them to save the seeds for next year, I'm wondering what the different varieties of melons that can cross-pollinate with each other, I know Cantaloupe and Honeydew can, and Watermelons with each other, but that's as far as my knowledge goes lol the melons I currently have are Honeydew, Cantaloupe, Dino (Gaya) Melon, Moon and Stars Watermelon, and both mini and large Yellow Watermelon, any advice is greatly appreciated