Was kann ich über Tulpenzwiebeln pflanzen?

Any winter bedding plant like pansies should be fine, get some that will be gone by the time your bulbs come up in spring. If you are interested in layering other bulbs for next year, look up bulb lasagne (if you haven’t already) but it might be too late for that planter as tulips should probably be lowest in the layers.

Pansies, violas, bellis, primroses, polyanthus, wallflowers, cyclamens.