Coral Trees
Care Guide

Southern California is home to several species commonly called Coral Trees, with the Naked Coral Tree (Erythrina coralloides) and the Kaffirboom Coral Tree (Erythrina caffra) being the most common in landscapes. The City of Los Angeles has planted thousands along Wilshire Boulevard and other prominent corridors, making it one of the region's most recognizable street trees.

Coral Trees bloom spectacularly — brilliant red, orange, or coral-colored flowers appear on bare branches in winter and early spring, creating a dramatic display before the large, tropical-looking leaves emerge. For estates seeking year-round visual interest, few trees compare during their bloom cycle.

The critical issue with Coral Trees is wood strength. Their rapid growth produces lightweight, brittle wood that decays readily. Large limbs can fail suddenly without warning, even on apparently healthy trees. This is not a tree that tolerates deferred maintenance. Regular structural pruning and professional monitoring are essential, not optional.

In the right setting, with the right management, Coral Trees are extraordinary. Without it, they become a liability.

Quick Reference

Best time to prune: Late summer to early fall (August–October), after blooming is complete and while the tree is actively healing. Avoid winter pruning on frost-sensitive varieties.

Pruning frequency: Annual crown maintenance is recommended for mature specimens. Young trees should receive structural training every year for the first 5–7 years to establish a strong, well-distributed scaffold.

Key priorities: Remove dead and decayed wood promptly. Reduce overextended lateral branches that have poor taper. Identify and manage codominant stems early. The goal is a structurally sound tree, not just a cosmetically pleasing one.

Never: Top a Coral Tree. Flush-cut large branches. Leave large stubs. Each of these practices invites extensive decay into a tree already predisposed to wood rot.

ANSI A300: Do not remove more than 20% of live canopy per cycle. Document all structural work, especially on mature specimens near targets.

Young trees: Water deeply every 7–10 days during establishment. Apply at the drip line. Coral Trees establish quickly in Southern California's climate.

Established trees: Highly drought-tolerant once established. Monthly deep watering during dry summer months is sufficient for most coastal locations. Inland sites may require watering every 2–3 weeks.

Overwatering risk: Significant. Overwatering promotes root rot and accelerates wood decay. Coral Trees planted in turf areas with frequent irrigation often show premature decline.

Fertilization: Annual deep root fertilization in early spring. Use a balanced fertilizer — Coral Trees are not heavy feeders. Avoid high-nitrogen formulations that promote excessive, weak growth.

Soil health: Well-draining soil is essential. Soil aeration and organic matter amendments support healthy root systems and reduce decay susceptibility.

Why did my Coral Tree drop a large limb without warning?

Coral Tree wood decays rapidly from the inside out. A limb can appear healthy externally while harboring extensive internal decay that reduces its structural integrity to nearly zero. This is why annual professional inspections are so important — they can identify concealed decay before a failure event occurs.

When do Coral Trees bloom?

Most Coral Tree species in Southern California bloom from December through March, producing brilliant red or orange flowers on bare branches before leaves emerge. The bloom period is one of the most spectacular in any SoCal landscape.

My Coral Tree has distorted, galled leaves. What is it?

This is very likely the Erythrina Gall Wasp, an invasive insect pest. The wasp causes galls (abnormal growths) on new leaves, petioles, and stems. It significantly weakens trees over multiple seasons. Contact a Certified Arborist for evaluation and treatment options.

Can I plant a Coral Tree near my pool or driveway?

Exercise caution. Coral Trees develop significant surface roots that can lift hardscape over time. Their brittle limbs present a real falling-debris hazard near vehicles and high-use areas. If you do plant near these locations, commit to regular professional maintenance.

How do I know if my Coral Tree's trunk is hollow?

External signs include sunken sections of bark, fungal conks or mushrooms at the base, large cavities visible where branches have been removed, and a hollow sound when the trunk is struck. A Certified Arborist can use resistograph drilling or sonic tomography to accurately map internal decay without damaging the tree.

Should I fill the cavity in my Coral Tree with concrete or foam?

No. Cavity filling with concrete or foam is an outdated practice that is no longer recommended. It does not strengthen the tree, can trap moisture and accelerate decay, and makes future inspection impossible. A Certified Arborist can assess whether the cavity is a concern and recommend appropriate management.

How often should a large Coral Tree be inspected?

At minimum annually. Large specimens near structures, driveways, or high-foot-traffic areas should be inspected twice per year — once before storm season and once after. Any significant wind event or storm damage warrants an immediate inspection.

What is the lifespan of a Coral Tree?

With proper care, 50–100 years. Without it — particularly if topped or left without professional maintenance — structural decay can render large specimens unsafe within 20–30 years.