They contain both native and non-native wildflowers. Non-native species were chosen on the basis of their versatility or ability to adapt to various conditions.
In general, Heliconias are evergreen in the Tropics and warm Subtropics, like zone 10. Further north, upper zone 9 and lower zone 8, they may be frozen back to the ground each Winter but survive to resprout the next Spring.
Do not fertilize wildflowers unless the soil is extremely depleted of nutrients. Fertilizers encourage weed growth and lush foliage rather than flowers.