If I put white roses in black dye, will they be black?

Yes, this can happen either during washing or deliberate dyeing of the garment. First, if the black dye runs from the black clothing during washing, it will change the white...

If your caterpillars are eating the basil, it is a high chance that it's fine. Most caterpillars would rather die of hunger than eat an unknown plant.

Put them in the oven from 25+ minutes and they will be beautifully cooked.

It's really very easy and less complicated than even this simple crochet rose. See crochet a granny square for full instructions with pictures on how to do this.

Any tea will dye white cotton to an off white shade or sepia if it is a particularly dark tea. Teas release tannins that create the coloration in the cotton....

No, the flowers should still be absorbing water or the dye will not be taken in.

Of course. Just put some of the dye in the water you give the flowers every day.

While you can leave them on the dye for longer, a couple of hours should be enough to color them.

The recipe here is using Chinese use black soybeans, which aren't the same as black turtle beans we use here for Mexican food.

Your only option is to bleach it (and then dye it close to your natural color if you wish). This is perfectly safe, though you could go to a salon...