What is the best way to keep my Lucifer plants/crocosmia from falling over? They are pretty tall and don't stand up on their own.
There are a number of trellis options available at any local hardware store, nursery or DIY store -- pick a design that will allow your Crocosmia to easily lean against it without getting in the way of the blooms. You can gently tie the stems to the trellis structure as close to the bottom of the plants as possible.
Fencing, bamboo poles, antique ladders...almost anything can be used. Get in touch with your creative side and have some fun when choosing a trellis structure for your Crocosmia!
Here are some additional tips on growing and care for Crocosmia: https://www.gardeningknowhow.com/ornamental/bulbs/crocosmia/crocosmia-bulb-care.htm