Though outdoor burro’s tails do produce flowers, it is much rarer for blooms to appear on plants grown indoors. When they flower, they produce clusters of star-shaped pink to red blossoms that will attract bees and flies. Only mature plants will flower. To encourage blooms, allow your plant to spend the summer outside and then move them inside to a cooler location with temperatures between 50 and 60 degrees Fahrenheit over the winter. Be careful when moving your plant back outdoors as it needs to acclimate to brighter conditions.