Clay Pebbles 10-20mm Grade Potting Soil & Substrates GrowTropicals
Houseplant

Clay Pebbles 10-20mm Grade

£3.99
Pack Size

FREE tracked delivery on orders over £60

Complete the set up
Description

Lightweight expanded clay aggregate have wicking properties that make them an excellent medium for growing plants hydroponically or for use as a component in a soil mix.

With two available sizes, our clay pebbles will meet the needs of small, medium and large plants alike. Clay pebbles are also commonly used as a drainage layer for terrariums and our clay pebbles, being darker and less uniform than some other brands, make for a more pleasing aesthetic when used for this purpose

Clay pebbles are nearly half the density of calcined clay and about the same density as horticultural charcoal, making it an ideal substrate option for drainage layers. We recommend covering clay pebbles with a material such as horticultural fabric or synthetic screening to prevent smaller-grained substrate materials from filtering down.


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.

Best quality plants guaranteed
7 day live arrival guarantee
Delivered to your door with care
Earn 19 points with this plant · 5 points per £1 Join free

How to care for Clay Pebbles 10-20mm Grade

Give me a bright spot and check my soil before watering.

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.
Good to know

Frequently Asked Questions

What is your returns policy?

We always aim to make sure our customers love our products, but if you do need to return an order within 14 days of purchase (not including plants*), or any items are damaged, we’re happy to help. Just email us directly at hello@growtropicals.com, and we’ll take you through the process. 

Please note: we cannot be held liable for any packaging costs should the original packaging be discarded.

*Unfortunately we cannot accept returns of undamaged plants as these are perishable items and are not saleable upon return. If a plant is damaged, we will compensate for this as per our live arrival guarantee.

When will my order arrive and how much is shipping?

When placing your order, you can choose from three dispatch speeds to suit your needs: Economy (prepared and shipped within 4-5 days), Standard (3-5 days), or Express (dispatched the very next day). Please keep in mind that "dispatch" refers to the time it takes our team to prepare and pack your items before handing them over to the courier, not the total delivery time.

Shipping costs are based on your total order value and will be calculated at checkout, with free shipping automatically applied to all orders over £60. For a full breakdown of shipping prices please see our help center here.

Additionally, to protect the health and quality of our live plants, orders containing plants are exclusively shipped Monday through Thursday. This careful scheduling prevents your plants from being stuck in a dark shipping depot over the weekend, ensuring they arrive at your door vibrant and healthy.

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.

Verified reviews

Rated by real customers

Clay pebbles praised for effective drainage and attractive appearance on plants. Customers said they "look lovely on top of plant pots" and go "further than you think." Quality consistently meets expectations with good value and fast delivery. One customer received wrong size (5-15mm instead of 10-20mm). Easy to clean and versatile for various applications.

  • These look lovely on the top of my plant pots & effective as drainage
  • Goes further than you think! I've managed to make several moss poles and still have plenty left
  • After two to three rounds of washing they are already very clean
  • 5 stars: 18 (95%)
  • 4 stars: 0 (0%)
  • 3 stars: 1 (5%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
M
Mandy

These look lovely on the top of my plant pots & seen to be effective as drainage at the bottom of the pots X

M
Mandy

These look lovely on the top of my plant pots & seen to be effective as drainage at the bottom of the pots X

M
Mark A.
Goes further than you think!

I bought 5l of the Leca (amongst other items to make my own aroid mix) and I have been very surprised at just how far this, and the other substrates, goes! I've managed to make several moss poles and still have plenty left over for further plant upgrades.

S
Simona S.
Excellent

Excellent

E
Emily C.
Quality as expected. Good value

Quality as expected. Good value for the amount of Leca in the bag. Fast delivery as usual

N
Nigel

Exactly as described

N
Nigel

Exactly as described

A
Annette C.
These are so cute and

These are so cute and their smaller size is great for alocasia roots.

G
Gayane H.
I ordered 8 litres (3900

I ordered 8 litres (3900 grams) , but unfortunately received the wrong fraction size. Instead of the expected 10-20 mm, I got 5-15 mm. I’m quite disappointed, as this wasn’t what I needed.

Hi Gayane,

I'm really sorry to hear that you have received the wrong size LECA with
your order.

Would you like to provide us with some images of what you have received? We
would be more than happy to resolve this for you.

L
Laura G.
Lovely as always

Lovely as always

P
Pete H.
Excellent service. Fast delivery. This

Excellent service. Fast delivery. This leca is the best.

F
FFF F.
It’s my first time using

It’s my first time using LECA and after two to three round of washing they are already very clean.

C
Chanelle W.
Quick delivery Product as described

Quick delivery
Product as described

K
Keira K.
Good quality

Good quality

A
Anastasija

Great

A
Anastasija

Great

N
Nicola D.
Great quality. Happy with my

Great quality. Happy with my order. As described

V
Victor F.
Excellent as always, just what

Excellent as always, just what I was looking for and good price

K
Kerry P.
Love these .use alot so

Love these .use alot so great price.

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