When should you split and repot an orchid?

After your orchid produces a keiki, wait until it has at least two leaves, and several roots that are at least two inches long. This will give it the best chance of surviving; you can also wait longer to be even more sure. The amount of time it takes a keiki to get to this size depends on the size of the parent plant and how well you care for it, but it can take weeks or even up to a year.