Microsorum thailandicum | Blue Oil Fern Plants GrowTropicals
Rare Microsorum

Microsorum thailandicum | Blue Oil Fern

£55.99 £109.99 SAVE 49%
Humidity-lover
Pot size
9cm £55.99

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Fern Premium Potting Mix
The perfect soil Fern Premium Potting Mix · 2.5L · £4.99
Description

Microsorum thailandicum, commonly referred to as the Blue Oil Fern, is a rare epiphytic or lithophytic fern native to Southeast Asia, including Thailand, Vietnam, and southern China. It is renowned for its iridescent blue-green fronds, which exhibit a metallic sheen due to specialised surface structures that reflect light. The fronds are strap-shaped, leathery, and can grow up to 20 cm in length and 2 cm in width. This fern typically grows in humid, shaded environments, such as limestone cliffs and tropical forests

The Blue Oil Fern thrives in warm temperatures and high humidity, making it well-suited for cultivation in terrariums or bathrooms where humidity levels are naturally higher. Its unique colouration is most pronounced under low to moderate indirect light conditions. 

Native to: Southeast Asia, including Thailand, Vietnam, and southern China. It naturally occurs in humid, shaded environments, such as limestone cliffs and tropical forests. 

Water: Maintain consistently moist but not waterlogged soil. Water when the top 2–3 cm of the substrate feels dry to the touch. Ensure the pot has adequate drainage to prevent root rot.

Light: Prefers low to moderate indirect light. Avoid direct sunlight, which can scorch the leaves. The iridescent blue colouration is more pronounced under lower light conditions. 

Humidity: Requires high humidity levels, ideally between 60% and 80%. Increase humidity by using a humidifier, placing the plant on a pebble tray with water, or grouping it with other plants. Due to its humidity needs, Microsorum thailandicum is also suitable for terrariums. 

Temperature: Thrives in temperatures between 18°C and 24°C. Protect from temperatures below 15°C and avoid sudden temperature drops. Keep away from cold drafts and heating vents to prevent stress.

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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Delivery & returns

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

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How to care for Microsorum thailandicum | Blue Oil Fern

Give me bright light out of the midday sun and keep my soil lightly moist.

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.
Get to know me

About Microsorum thailandicum | Blue Oil Fern

Microsorum thailandicum | Blue Oil Fern is a houseplant that takes a little effort. It needs bright indirect light, watering often enough to keep the compost evenly moist, high humidity and a minimum temperature of 10°C.

Good for

Kitchen Bathroom

Care level

EasyChallenge

A little effort

Light

ShadeFull sun

Bright, indirect light

Watering

Evenly moistDries out fully

Keep evenly moist

Humidity

Average homeHigh humidity

Needs high humidity

Temperature

Keep above 10°C · Happy at normal room temperature

Feeding

Feed monthly with a balanced fertiliser from spring to autumn, and let it rest over winter.

Growth habit

Upright →Clumping →

Plant type

Fern →

Genus

Microsorum →
Good to know

Frequently Asked Questions

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.
Meet the family

Everything about Microsorum

Microsorum ferns, including the Kangaroo Fern and Crocodile Fern, want steady moisture, shade and warmth. Here is how to grow them well indoors.

More about Microsorum care
Microsorum Care Guide
Why Grow Tropicals

Plants delivered the way they deserve

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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Microsorum thailandicum | Blue Oil Fern
£55.99 £109.99