Answer: Indian blanket (Gaillardia pulchella) has high sun and salt tolerance. It is a colorful native annual or perennial. As easily grown as it is beautiful. Considerable variation in flower color; typical variety bears red flowers with yellow-tipped petals. Plant in open site with good drainage. Good for beach-front plantings. Beach sunflower (Helianthus debilis) grows 36-48 in full sun: hig salt tolerance, this plant is erect or prostrate, spreading plant with sandpaper-like leaves and 2.5 - three-inch yellow flowers. Suitable for beach-front plantings. Good for attracting butterflies. Daylily (Hemerocallis) grows 12-24" in full sun or partial shade. It is moderately tolerant to salt and is a clump-forming perennial with grass-like leaves and lily-like flowers from late spring to fall, depending on variety. Available in yellow, orange, red, pink, purple, and near-white. Firecracker plant (Russelia equisetiformis) grows 24-48" in full sun and has a high tolerance to salt. Grown for weeping habit, masses of small, red tubular flowers, and scale-like leaves. Often used in planters. Requires freely draining soil. Russelia sarmentosa is similar, although with actual leaves and smaller red flowers that are highly attractive to butterflies. Desert rose (Adenium obesum) is a shrub growing 3-7' in full sun with moderate salt tolerance: Very showy flowers year-round, particularly during hot, dry weather. Must have perfect drainage since this plant is very prone to root and stem rots. Will lose leaves during cool weather. Excellent for rock gardens.
Hope these suggestions are helpful.
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