FLOWERING SHRUB. If grown in open put this against a warm south wall; it is also a useful conservatory plant. It is sometimes called the coral tree because the scarlet blossom is in racemes and has that appearance. Erythrina crista-galli reaches about 6 ft. andin early summer. It requires a rich soil with sand and grit, and periodical with liquid manure. Protect base in winter. Increase by heeled raised under glass and with bottom heat.