Q: Can you recommend some plants that can tolerate salt?
A: Some possible choices of shrubs are Pittosporum, Yaupon Holly, Lantana, or Silverthorn (Elaeagnus pungens). Ask you local nursery about dwarf varieties which would be a good choice to grow in pots. There are several varieties of Lantana such as ‘Golden mound’ which is yellow. There are two others, one with white flowers and the other with purple flowers, which are commonly found at local garden centers and plant nurseries. Any of these three will attract adult butterflies as they are searching for nectar. Smaller, salt tolerant plant choices (reaching heights of only 2-3 feet) are Coontie, Lirope, Purslane (Portulaca spp), or Algerian ivy.
You might try Beach Morning Glory or Cape Honeysuckle which could be trained to climb a trellis – both of these would attract hummingbirds. Palms for north Florida would be European, Canary Island Date, Pindo, Lady, and Windmill. Moderately salt tolerant trees are Magnolia, loquat, Chaste, and Dahoon holly. For more ideas and specific information about growth habits of these plants check out the University of Florida website: http://edis.ifas.ufl.edu/ep012