Cone Bush (Leucadendron): Care, Varieties, and Growing Tips

By Richard Flowers, ACCNP, Green Thumb Nursery Ventura

If you want a plant that is low-maintenance, avoided by deer, and drought-tolerant, the cone bush (Leucadendron) might be exactly what your garden has been waiting for. These Mediterranean-style coastal gems bring vivid winter color to Southern California landscapes and make some of the finest cut flowers you can grow.

What Is a Cone Bush (Leucadendron)?

A cone bush is an evergreen shrub in the genus Leucadendron, a member of the Proteaceae family native to the South African fynbos. Its showy relatives in the same family include protea, pincushion (leucospermum), grevillea, and banksia, so if you already grow and love those, you will find the cone bush right at home. You can read more in our introduction to protea and its Proteaceae relatives.

The botanical name is a bit of a misnomer. “Leukos” means white and “dendron” means tree in Greek, and while white forms do exist, the plants are most prized for vivid, vibrant color in shades of orange, pink, yellow, or red, depending on the cultivar. What most people read as brightly colored “petals” are actually bracts, modified leaves that surround the small true flowers at each branch tip. Those exotic, waxy, spider-like blooms appear from late winter into spring, and the bracts can sometimes reach 12 inches across.

The common name comes from the woody, cone-like seed heads (botanically, infructescences) that form after flowering. Here is a fact that surprises many gardeners: Leucadendrons are dioecious, meaning individual plants are either male or female, and only the female plants form the showy woody cones. That is why the seed cones vary so much from plant to plant. The cones contain numerous seeds, and about half of the species store those seeds in fireproof cones, releasing them only after a fire has killed the plant or the branch bearing the cone. It is a classic fire-adapted survival strategy from their native shrubland.

Above all, cone bushes are grown for that cone-like inflorescence, which makes a stellar, long-lasting cut flower. The stems even survive in a vase long after the water has dried up. When not in flower, the plants remain valuable for their mostly neat, durable foliage, often rich green or reddish-tinged in summer, in almost formal habits. Many cone bushes have a chameleon-like ability to shift their leaf color from green to burgundy or blush tones to shades of yellow through the seasons, which makes them an outstanding garden subject.

How to Grow Cone Bush in Southern California

Give a cone bush full sun, fast-draining and slightly acidic soil, and very little water once it is established, and it will reward you for years. These South African natives are built for our Mediterranean climate, but they are unforgiving about two things: soggy roots and the wrong fertilizer.

Start with sun and soil. Cone bushes need at least 6 to 8 hours of direct sun and exceptionally fast, well-draining sandy or gritty soil that is acidic, ideally in the pH 5.0 to 6.5 range. A good approach is to blend an acid planting mix and soil sulfur uniformly into the planting area. In heavy clay, do not fight it: plant in a suitable container, a raised bed, or on a slope or mound where water drains freely. The Ruth Bancroft Garden recommends acidic soil with excellent drainage for exactly this reason. When planting, try not to disturb the roots, which are delicate.

Now the most important rule, and the one that catches the most people: go low or zero on phosphorus. Proteaceae evolved on some of the most phosphorus-poor soils on earth, and they grow specialized proteoid (cluster) roots that scavenge phosphorus so efficiently they cannot shut the uptake off. Feed them standard garden fertilizer and the result is phosphorus toxicity, which shows up as leaf scorch and chlorosis and can kill the plant outright. This species is not a heavy feeder and generally needs no fertilizer at all. If growth looks genuinely stunted, feed lightly with a low-phosphorus or phosphorus-free, slow-release food that is low in nitrogen and higher in potassium (the third number on the package). You may also supplement with soil sulfur to maintain acidity.

Water deeply and slowly in the absence of rain, letting a hose trickle at the base of the plant. One watering per week is usually plenty, and you should let the soil dry between waterings. Never water while the soil is still wet from the last irrigation. Cone bushes despise wet feet and soggy soil, which invites Phytophthora root rot and can cause near-instant death. Keep water off the foliage when you can, because wet leaves encourage fungal disease; if overhead watering is your only option, do it early so leaves dry before night. A layer of mulch conserves moisture and keeps roots cool, but keep it off the trunk. After the first year or two, these plants are genuinely drought-tolerant and want water only during extended dry spells.

A few final conditions round it out. Cone bushes prefer to live above freezing and are hardy to about the mid-20s F (roughly 20 to 25 F), so protect them during hard cold snaps. They love ocean winds but resent hot, dry winds. Give them good air circulation and do not crowd them; do not let the shrub touch its neighbors, or it may pick up foliar diseases. They are deer-resistant, excellent on slopes, and happy alongside Grevillea, Australian Fuchsia, Agave, Cordyline, Kangaroo Paw, Tea Tree, ornamental grasses, New Zealand Flax, cactus, and succulents like Sticks on Fire in a sheltered seaside garden.

Best Cone Bush Varieties for Southern California

There is a cone bush for almost every spot, from bold 10-foot specimens to compact types that fit a container. The table below covers eight reliable choices for SoCal gardens. For the full current selection, you can search Leucadendron in our plant library, and it is always wise to visit a Green Thumb Nursery near you and call ahead for availability.

Variety	Color	Approx. size (H x W)	Notes
‘Safari Sunset’	Deep red to burgundy bracts aging to cream	8 to 10 ft x 6 to 8 ft	The classic; the world’s top cut-flower Leucadendron; hedge or specimen
‘Jester’ (Safari Sunset Jester)	Variegated pink, cream, and green foliage with red bracts	4 to 5 ft x 4 to 5 ft	Colorful compact sport of Safari Sunset; great in pots and small gardens
‘Wilson’s Wonder’	Yellow and cream aging to strawberry red	4 to 7 ft x 6 to 8 ft	Large showy bracts; tolerates heavier soil if drainage is good
‘Ebony’	Near-black foliage with fiery red bracts	5 to 8 ft x 6 ft	Dramatic dark foliage; winter color
‘Pisa’	Lime and yellow-green bracts, silvery foliage	to 8 ft, upright	Vigorous erect silvery accent
‘Chief’	Pale yellow bracts with pink center, red summer foliage	6 to 10 ft x 6 to 8 ft	Fast, upright, large
‘Red Gem’	Red and yellow	2 to 4 ft x 4 to 5 ft	Compact; front-of-border or container
L. salignum types (such as ‘Winter Red’)	Red and yellow, color-changing foliage	1 to 3 ft x 2 to 4 ft	Low, tough, resprouting group; best compact option

‘Safari Sunset’ is the one to know first. San Marcos Growers rates it as the world’s most popular cut-flower Leucadendron, growing in full sun with low water in well-drained soil and hardy into the low 20s F. It works equally well as a hedge, a screen, or a single dramatic specimen.

Pruning and Cut Flowers

The best way to prune a cone bush is to harvest it. Cutting long stems for the vase is itself the pruning the plant needs, so you get beautiful arrangements and a tidier, bushier shrub at the same time. Those cut stems are famously long-lasting, holding their color in a vase well after the water is gone.

Prune during and after flowering, selectively shortening the long, leggy shoots by about half to encourage showy new growth. Always cut above at least four leaves, and never prune a leafless branch, because bare wood will not resprout reliably. Clip off wilted flowers to keep the plant neat and encourage new blooms. Light, regular harvesting through the season keeps a cone bush looking its best far better than one hard annual cutback.

Why Isn’t My Cone Bush Blooming or Coloring Up?

A cone bush colors up best on a mature plant growing in full sun with lean soil and sharp drainage. If yours stays green and dull, the usual culprits are too much shade, too much fertilizer (especially phosphorus), or soggy soil, any one of which will hold the color back.

Work through the causes in order. First, check sun: anything less than 6 hours of direct light dims the bracts. Second, resist the urge to feed. Rich or high-phosphorus fertilizer pushes soft green growth at the expense of color and can poison the plant, as described above, so lean soil is a feature, not a problem. Third, confirm drainage, because roots sitting in wet soil will never color up and may rot. Finally, give it time. The bracts are showiest from late fall through spring, peaking in winter, and young plants simply need a season or two of maturity before they put on their full display.

Cone Bush (Leucadendron) FAQ

What is a cone bush?

A cone bush is an evergreen shrub (genus Leucadendron) in the Proteaceae family, native to South Africa. It is grown for its colorful bracts and woody, cone-like seed heads, and it makes a popular, long-lasting cut flower.

Is cone bush the same as Leucadendron?

Yes. “Cone bush” is the common name for Leucadendron, named for the cone-shaped seed heads the female plants produce. Leucadendron relatives in the Proteaceae family include protea, pincushion (leucospermum), grevillea, and banksia.

How big does a cone bush get?

Most popular garden cultivars reach about 3 to 8 ft tall and wide. Compact types stay near 1 to 3 ft, while large cultivars like ‘Safari Sunset’ and ‘Chief’ can reach 10 ft or more.

How do you care for a cone bush (Leucadendron)?

Give it full sun, fast-draining and slightly acidic soil, and low water once established. Feed lightly with a low-phosphorus or phosphorus-free fertilizer only if growth stalls, since Proteaceae are sensitive to phosphorus. It is drought-tolerant, deer-resistant, and hardy to about the mid-20s F.

Why is my cone bush not coloring up or blooming?

The bracts color up best on mature plants in full sun with lean soil and sharp drainage. Too much shade, too-rich or high-phosphorus fertilizer, or soggy soil will all keep a cone bush from coloring up. Bracts are showiest from late fall through spring.

Is cone bush deer-resistant and drought-tolerant?

Yes to both. Cone bush is a Mediterranean-climate, drought-tolerant shrub that needs little water once established, and deer typically leave it alone, making it a low-maintenance choice for SoCal gardens.

Sources:

• San Marcos Growers
• SANBI PlantZAfrica
• The Ruth Bancroft Garden

Find Cone Bush at Green Thumb Nursery

We carry cone bush (Leucadendron) along with many other water-wise, deer-resistant plants for the SoCal landscape. Because selection changes with the season, call ahead to check on specific varieties, then visit a Green Thumb Nursery near you to see what is in bloom.

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