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.
Houseplant
Lava Rock (Fine Grade)
£4.99
Pack Size
FREE tracked delivery on orders over £60
Description
One of the best choices for that very chunky aeration in your substrate mix. Its porosity lends itself to well-draining mixes. Lava rock is also often used as drainage and/or as the sole substrate in terrariums where the plants don’t require a high level of nutrients.
Lava rock is also great drainage material for vivariums. Lava rock is a great substrate that has a high surface area making it an ideal filter/drainage material that won't break down quickly. We recommend covering lava rock with a material such as horticultural fabric or synthetic screening to prevent smaller-grained substrate materials from filtering down into it.
Lava rock is also an excellent biological filter. The large surface area lends itself to a high volume of beneficial bacteria, Nitrosomonas and Nitrobactercomes, that will convert ammonia into nitrite and nitrite into nitrate respectively.
3-5mm Grade
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
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.
Flawless leaves, stunning variegation, and clearly cared for by experts. It’s already a talking point in my home office.
Hard to find rare plants that are pet-safe. Ours arrived in perfect condition and looks amazing without any worry.
Good to know
Frequently Asked Questions
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Why Grow Tropicals
Plants delivered the way they deserve
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
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
Fine grade material highly praised for bonsai and soil mixes with excellent drainage. Customers said it's "exactly what I was looking for" with "quality material." Praised for prompt delivery and good value. One customer reported packaging damage with product spillage.
- Excellent medium for bonsai trees, drains very well
- Excellent product, good price fast delivery, excellent as a bonsai mix
- Exactly what I was looking for in a top dressing
D
Exactly what I was looking for in a top dressing. Arrived reasonably promptly with good customer service and useful delivery updates .
V
I have purchased this a few times and I love it, it is an excellent medium for bonsai trees it drains very well
P
Prompt delivery, quality material
B
As always, great product and quick delivery from Grow Tropicals. Just what I needed as my final ingredient in a soil mix.
B
As always, great product and quick delivery from Grow Tropicals. Just what I needed as my final ingredient in a soil mix.
V
Excellent product, good price fast delivery, excellent as a bonsai mix
L
One pack been broken and half of lava rock was in the parcel.
C
Once again looks as advertised, well packed with prompt delivery.
C
MORE than happy! Great looking Lava. Highly Recommended Seller. A++++++
C
MORE than happy! Great looking Lava. Highly Recommended Seller. A++++++
J
Good, as described.
A
Just what I ordered
M
Grear
Lava Rock (Fine Grade)
£4.99