White Bottlebrush

Callistemon salignus

Name: Callistemon salignus
Brand: GROW TROPICALS
SKU: CALLSALI19
Price: 17.49 GBP
Availability: InStock

£17.49

Overwinter under coverSun-lovingEvergreenRHS award winnerLoved by pollinators

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Description

Callistemon salignus, the white bottlebrush, is one of the most elegant and reliable of the bottlebrushes for a warm British garden. Unlike its crimson cousins, this one carries soft, creamy-white bottlebrush spikes from late spring to midsummer, and it earns its other common name, pink tips, from the new growth, which emerges a glowing coppery-pink before settling to slender, willow-like green leaves. Crush a leaf and it smells of lemon; peel back an older stem and the bark is papery white. It holds the RHS Award of Garden Merit.

Hardiness and seasons. This is a plant for the warmest corner of the garden. Rated H2, it is tender in most of the UK: reliable outdoors year-round only in the mildest coastal and city gardens, and elsewhere best in a pot that can be moved somewhere bright and frost-free for winter. Cold winter wet is the main killer rather than cold alone, so sharp drainage matters as much as shelter. The pink-tipped flush of new growth in spring is a season in itself, followed by the creamy brushes from around May to July.

How and where to grow. Give it full sun in a warm, sheltered, south or west facing position, ideally against a wall that radiates heat, in fertile, sharply drained, neutral to acid soil. It resents shallow chalk and winter waterlogging. It thrives in mild coastal gardens and does very well in a large container of gritty, slightly acidic compost. Expect a large shrub or small tree of 4 to 8m in ideal conditions over many years, far smaller and easily pruned in a UK garden or pot.

Using it in the garden. The pale brushes light up an exotic border against darker foliage, and they are rich in nectar, so the shrub hums with bees and other pollinators in flower. Grow it beside red and pink flowered bottlebrushes for a two-tone display, or as a soft, willowy specimen among bolder architectural exotics. Trim lightly behind the faded brushes to keep it bushy.

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All plants are covered by our 7-day live arrival guarantee. We pack every order in protective, sustainable packaging designed to keep your plants safe in transit, and every plant is checked before it ships. On the rare occasion something is not right on arrival, we will make it good, provided the plant is still in its original nursery pot.

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What to Expect

Seasonal by nature: what to expect

Grown outdoors, the way nature intended. Weather-tested and hardened in real UK conditions, so they thrive in your garden. A few marks on the older leaves are normal, the sign of a tough, real plant rather than a flaw.
It follows the seasons. Depending on when you order, your plant may arrive cut back, dormant or leafless. That's healthy: dormancy is the ideal time to plant.
Posted, not posed. Big leafy plants like bananas and gingers may be trimmed or gently folded to travel safely. It does the plant no harm, and it powers away again in spring.

Not sure what to expect from yours? Dormant, cut-back or weather-marked plants are all perfectly healthy and normal. Read what to expect through the seasons

Delivery & returns

Order by 1pm Monday to Friday for same day dispatch. Every plant travels in protective, plant-safe packaging with tracked delivery.

Changed your mind? See our Return Policy.

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How to care for White Bottlebrush

Plant me in full sun and bring me under cover before the frosts.

In their words

What our customers say

Arrived just like the photos - maybe even fuller. Healthy, well-acclimated, and straight into my collection with no issues.

Emily P.

Flawless leaves, stunning variegation, and clearly cared for by experts. It’s already a talking point in my home office.

James R.

Hard to find rare plants that are pet-safe. Ours arrived in perfect condition and looks amazing without any worry.

Sophie L.

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About White Bottlebrush

Callistemon salignus needs full sun and moist but well-drained soil. It is frost tender and must come under cover for winter.

Good for

Coastal & Exposed Exotic Borders Pots & Containers Wildlife & Pollinators

Hardiness

TenderVery hardy

Tender (H2): down to around 1°C. Tolerates cool conditions but not frost; protect or bring in over winter.

RHS H2 and borderline hardy in the UK, so it needs a little care in winter. The key point to understand is that cold WET conditions, not cold alone, are what kills a bottlebrush: roots sitting in cold, waterlogged soil through winter do far more harm than a short, dry frost. Give it the warmest, most sheltered spot you have, plant into sharp, free-draining soil or a slightly raised position, and protect the crown with horticultural fleece during hard or prolonged frosts. In colder or wetter inland gardens, grow it in a pot that can be moved somewhere bright and frost-free for the coldest months. Read moreShow less

RHS H2 and borderline hardy in the UK, so it needs a little care in winter. The key point to understand is that cold WET conditions, not cold alone, are what kills a bottlebrush: roots sitting in cold, waterlogged soil through winter do far more harm than a short, dry frost. Give it the warmest, most sheltered spot you have, plant into sharp, free-draining soil or a slightly raised position, and protect the crown with horticultural fleece during hard or prolonged frosts. In colder or wetter inland gardens, grow it in a pot that can be moved somewhere bright and frost-free for the coldest months.

Position

Full sunSouth-facingWest-facingSheltered

Full sun. Choose a warm, sheltered, south or west facing position, ideally against a sunny wall or fence that radiates heat and offers extra winter protection. Shelter it from cold, drying winds for the best growth and flowering. Read moreShow less

Full sun. Choose a warm, sheltered, south or west facing position, ideally against a sunny wall or fence that radiates heat and offers extra winter protection. Shelter it from cold, drying winds for the best growth and flowering.

Soil

LoamSandMoist but well-drainedWell-drainedAcid pHNeutral pH

Fertile, sharply drained neutral to acid soil. It dislikes very alkaline ground and, above all, cold winter wet, so lighten heavy soils with plenty of grit and avoid low, boggy spots where water collects. In a container use a free-draining, peat-free, slightly acidic compost with added grit. Read moreShow less

Fertile, sharply drained neutral to acid soil. It dislikes very alkaline ground and, above all, cold winter wet, so lighten heavy soils with plenty of grit and avoid low, boggy spots where water collects. In a container use a free-draining, peat-free, slightly acidic compost with added grit.

Watering

Water regularly through the first one to two growing seasons to settle the roots, keeping the soil moist but never waterlogged. Once established it is fairly drought tolerant and needs little summer water in open ground. Ease right off in winter so the roots are not left sitting cold and wet, which is the main risk to this plant. Feed pot-grown specimens through spring and summer. Read moreShow less

Water regularly through the first one to two growing seasons to settle the roots, keeping the soil moist but never waterlogged. Once established it is fairly drought tolerant and needs little summer water in open ground. Ease right off in winter so the roots are not left sitting cold and wet, which is the main risk to this plant. Feed pot-grown specimens through spring and summer.

Mature size

Height4-8 m

Spread2.5-4 m

Reaches full size in 10-20 years

Growth habit

Bushy

Flowering

JFMAMJJASOND

May-Jul · White, Cream

Seasonal colour

SpringSummerAutumnWinterFlowerFoliageBerries

Foliage

Evergreen (stays evergreen only when kept frost-free over winter)

Pruning

In spring, trim lightly just behind the faded bottlebrush spikes to shape and encourage new flowering shoots. Avoid hard cuts into bare wood.

Toxicity

No reported toxicity to people or pets; Callistemon is generally considered non-toxic. As with any garden plant, the foliage is not intended to be eaten.

Native range

E. Australia

Family

Myrtaceae

Also known as

Callistemon salignus

Genus

Callistemon

Good to know

Frequently Asked Questions

Is Callistemon salignus hardy in the UK?

Callistemon salignus is borderline hardy in the UK, rated RHS H2. It is happiest in mild, coastal and city gardens and will need winter protection in colder inland spots. The key thing to understand is that cold, wet winter conditions, not cold alone, are the main risk, so sharp drainage and a warm, sheltered position matter more than anything else. See our hardy exotics: what to expect guide for seasonal detail.

Where is the best place to plant a willow bottlebrush?

Give it the warmest, most sheltered spot in the garden, ideally in full sun against a south or west facing wall that radiates heat. It thrives in a hot, free-draining exotic border and, in milder coastal gardens, copes well in coastal and exposed positions. Shelter it from cold, drying winds.

Why is winter wet more of a risk than cold for a bottlebrush?

Roots sitting in cold, waterlogged soil through winter are far more damaging to Callistemon than a short, dry frost. The plant can shrug off brief cold if it is dry at the roots, but prolonged cold combined with wet quickly leads to rot. Plant into sharp, free-draining soil or a slightly raised bed, add grit to heavy ground, and avoid low spots where water collects.

Can I grow Callistemon salignus in a pot?

Yes, and in colder or wetter gardens a pot is the ideal way to grow it. Use a free-draining, peat-free, slightly acidic compost with added grit, and it makes a superb, moveable specimen among your other plants for pots and containers. The big advantage is that you can move it somewhere bright and frost-free for the coldest, wettest months.

When does it flower and is it good for pollinators?

Soft, creamy-white bottlebrush spikes appear from late spring into midsummer, roughly May to July, set off by coppery-pink new growth at the shoot tips. They are rich in nectar and a real magnet for bees and other pollinators, and trimming off the faded brushes often encourages a second, lighter flush.

How big does Callistemon salignus grow and does it need pruning?

In ideal conditions it slowly reaches around 4 to 8 m tall with a 2.5 to 4 m spread, though it is easily kept much smaller in a pot or with light pruning. It needs very little pruning: simply trim lightly after flowering to keep a neat shape. Explore more hardy exotics to pair with it.

Does my plant come with a pot?

Your plant will arrive in its nursery grow pot — the plastic pot it's been growing in. We don't include a decorative pot as standard, and there's a good reason for that: it means you get to choose one that fits your space and style, rather than being stuck with something that doesn't suit your home.

It also means you're not paying extra for a pot you might not want. The nursery pot is perfectly fine to keep your plant in for a while, just pop it inside a decorative cover pot or cache pot and you're good to go. When you're ready to repot (usually after a growing season or when roots start poking out the bottom), you can move it into something more permanent with fresh soil.

If you're not sure what size cover pot to go for, check the pot selector tool listed above, you'll want a decorative pot that's a centimetre or two wider than that to give it a comfortable fit.

How big will my plant be when it arrives?

Every plant on our site includes the pot size (e.g. 12cm) and, where possible, an approximate height. That's the most reliable way to set your expectations, photos can sometimes make a plant look larger or smaller than it really is.

If you're thinking "that sounds quite small for the price," here's something worth knowing: younger, smaller plants almost always adapt better to your home than larger ones. They adjust faster to your light and humidity, put out new growth more quickly, and tend to establish stronger root systems long-term. A plant that grows into your space will usually outperform one that was already big when it arrived.

That said, every plant is an individual. The one you receive may vary slightly in height, shape, or fullness compared to the photo, that's the nature of living things, not a quality issue. We select healthy, well-established specimens, and if you ever feel your plant doesn't match what you were expecting, just get in touch and we'll take a look.

What makes your plants different from the supermarket or garden centre?

There's a big difference between a plant that's been sitting under on a retail shelf and one that's been looked after and cared for by people who specialise in exactly this.

Our plants are grown in house or sourced from specialist nurseries, many of them varieties you simply won't find at your local garden centre or supermarket. Before anything leaves us, it's checked over by our horticultural team to make sure it's healthy, well-rooted, and ready to thrive in your home. We're not shifting volume off a pallet, we're choosing plants we'd want to keep ourselves.

When you buy from a supermarket, you get a plant and a generic care label. When you buy from us, you get the knowledge that comes with it, detailed care guidance, a team you can actually contact if something isn't going right, and the confidence that what's arriving has been looked after properly from the moment it was grown to the moment it reaches your door.

We're a specialist nursery first, not a retailer that happens to sell plants. That's the difference, and you'll see it the moment you open the box.

What should I do when my plant arrives?

First things first, unbox it as soon as you can. Plants don't love being in dark boxes any more than you would, and the sooner yours is out and breathing, the better.

Remove all the packaging carefully, give the soil a check with your finger, and water lightly if it feels dry. Then find it a spot with appropriate light, but avoid putting it straight into harsh direct sun or next to a radiator. Think of it like arriving somewhere new after a long journey: it needs a moment to adjust.

It's completely normal for your plant to look a little tired or droopy after transit. This is called transit stress, and most plants bounce back within a week or two. You might see a yellow leaf or some drooping, don't panic, and resist the urge to overwater or start repotting straight away.

Our advice for the first couple of weeks: leave it in its nursery pot, water it only when the top layer of soil feels dry, and let it acclimatise to your home's light, temperature, and humidity. Once it's settled in and showing signs of new growth, you can think about repotting or moving it to its permanent spot.

Every plant we sell comes with a care guide on the product page so you'll know exactly what it needs going forward. And if anything doesn't look right, get in touch with our team, we're always happy to help.

Will my plant survive being shipped?

Yes! and we go to serious lengths to make sure of it. Every plant is hand-packed by our team with protective wrapping and secure, custom-designed boxes to keep it stable and safe in transit. We've shipped hundreds of thousands of plants across the UK and our packaging methods have been refined over years to handle the bumps and jolts of delivery.

During colder months, we monitor weather forecasts and offer heat packs where needed to protect against frost. In extreme conditions, we may hold your order for a day or two rather than risk sending it out, we'd rather you wait an extra day than receive a stressed plant.

That said, plants are living things, and the occasional transit wobble can happen. If your plant arrives damaged or isn't in the condition you'd expect, just get in touch within 48 hours with a photo, and we'll make it right, whether that's a replacement or a full refund. No fuss.

The short version: we treat every box like it's going to someone who really cares about what's inside, because it is.

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Callistemon salignus

£17.49