Crocosmia masoniorum Plants - Outdoor GROW TROPICALS
Crocosmia masoniorum — 11cm / 0.75L11cm / 0.75L
Giant Montbretia

Crocosmia masoniorum

£8.99
Hardy in the UKSun-lovingRHS award winnerLoved by pollinators
Pot size
11cm / 0.75L £8.99

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Description

Crocosmia masoniorum, the giant montbretia, is the boldest and most statuesque of all the crocosmias and a star performer in any late-summer exotic border. From a clump of broad, upright and beautifully pleated sword-shaped leaves rise tall arching spikes carrying dense sprays of upward-facing, flame-orange flowers, each one glowing with a warm yellow base. At around 1.2m tall it brings real height and drama exactly when the garden needs a lift, and it holds the RHS Award of Garden Merit for its outstanding garden performance.

This South African species has proved thoroughly at home in British gardens. Rated RHS H4, it is hardy across most of the UK, the corms sitting dormant below ground through winter before bursting back into growth each spring. In colder or wetter areas a deep autumn mulch over the crowns sees it reliably through the coldest months. For more on how these plants behave through the seasons, see our hardy exotics guide.

Water well through the first season while the corms establish, after which the clumps become impressively resilient and fairly drought-tolerant. The nectar-rich flowers are a magnet for bees, butterflies and hoverflies, making it a brilliant choice for wildlife and pollinator planting. Use it towards the middle or back of exotic borders, in bold coastal and exposed seaside schemes, or in a large container on a sunny patio among your other plants for pots. It sits beautifully alongside our other hardy exotics.

Every Crocosmia we supply is nursery-grown and carefully selected for a strong, healthy corm and root system, packed with care to arrive in top condition and ready to establish quickly.

Live Arrival Guarantee

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 Giant Montbretia

Plant me in full sun and I will stand a UK winter outdoors.

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 Giant Montbretia

Crocosmia masoniorum needs full sun or partial shade and moist but well-drained soil. It is hardy to around −10°C, standing an average UK winter outdoors.

Good for

Coastal & Exposed Exotic Borders Pots & Containers Wildlife & Pollinators

Hardiness

TenderVery hardy

RHS H4 · Hardy Exotic · down to around −10°C

hardy in most of the UK (RHS H4), with a protective mulch worth adding in cold or exposed gardens.

Position

Full sunPartial shadeEast-facingSouth-facingWest-facingExposedSheltered

full sun for the strongest flowering and sturdiest stems, though it also grows well in partial shade.

Soil

ChalkClayLoamSandMoist but well-drainedAcid pHAlkaline pHNeutral pH

any fertile, free-draining soil from chalk to clay, across the full pH range, with winter drainage the priority.

Watering

Keep the soil moist through the first growing season while the corms root in, watering well in dry spells. Once established the clumps are fairly drought-tolerant. Lift and divide congested clumps every few years in spring to keep them flowering freely. Read moreShow less

Keep the soil moist through the first growing season while the corms root in, watering well in dry spells. Once established the clumps are fairly drought-tolerant. Lift and divide congested clumps every few years in spring to keep them flowering freely.

Mature size

Height1-1.2 m
Spread0.5-0.6 m

Reaches full size in 2-5 years

Growth habit

Clump-forming

Flowering

Jul-Aug · Orange

Seasonal colour

Foliage

Deciduous

Pruning

Cut faded flower stems, leave the foliage to die back naturally, then tidy in late winter. Lift and divide congested clumps in spring.

Toxicity

Crocosmia are generally regarded as non-toxic and there are no serious toxicity reports for people, cats or dogs. As with many garden plants, eating the corms or foliage may cause mild stomach upset, so it is sensible to discourage pets and children from doing so.

Native range

E. Cape, South Africa

Family

Iridaceae

Also known as

Crocosmia masoniorum

Genus

Crocosmia →
Good to know

Frequently Asked Questions

Is Crocosmia masoniorum hardy in the UK?

Yes. Crocosmia masoniorum is rated RHS H4, so it is hardy across most of the UK. The corms sit dormant below ground through winter and reshoot in spring. In colder or wetter gardens, a deep autumn mulch over the crowns gives extra protection, as explained in our hardy exotics guide.

How tall does Crocosmia masoniorum grow?

It is one of the tallest crocosmias, reaching around 1.2m in flower on arching spikes above a clump of pleated, sword-shaped leaves roughly 0.6m across. That height makes it ideal for the middle or back of an exotic border.

Does Crocosmia masoniorum prefer sun or shade?

It flowers best in full sun, which also produces the sturdiest, most upright growth, but it will grow happily in partial shade too. Give it an open, sunny spot for the strongest display of flame-orange sprays.

When does Crocosmia masoniorum flower?

It flowers in mid to late summer, usually through July and August, carrying upward-facing, flame-orange blooms with a warm yellow base. The seed heads that follow stay attractive well into autumn.

Can I grow Crocosmia masoniorum in a pot?

Yes. It grows well in a large, deep container of free-draining compost in a sunny position, though it needs regular watering and feeding through summer. Browse more of our plants for pots and containers.

Is Crocosmia masoniorum good for pollinators?

Yes. The nectar-rich, tubular flowers are a magnet for bees, butterflies and long-tongued hoverflies, making it a valuable late-summer nectar source for a wildlife and pollinator garden.

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.
Why Grow Tropicals

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Packaged with Care

Packaged with Care

Every order is hand-packed in eco-friendly, protective packaging - refined through thousands of deliveries to ensure your plant arrives healthy, hydrated, and looking its best.

Backed by our Live Arrival Guarantee.

Perfect for Gifting

Perfect for Gifting

From rare collector’s pieces to easy-care favourites, our plants arrive fully potted and ready to enjoy. Add a personalised note at checkout for a thoughtful finishing touch.

Delivered fresh, beautiful, and gift-ready.

Sustainability at Heart

Sustainability at Heart

All plants are ethically sourced from trusted growers, never wild-collected. Every order ships carbon-neutral in minimal-waste packaging.

Good for your home - and the planet.

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