pumice for cactus soil Pumice 4-20mm (Cactus/Succulent/Bonsai)
SKU: 85533019554
pumice for cactus soil

pumice for cactus soil Pumice 4-20mm (Cactus/Succulent/Bonsai)

Sale price$25.92 Regular price$28.80
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Ships within 48 hours · Estimated delivery Jun 29 - Jul 4

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Description

pumice for cactus soil Pumice 4-20mm (Cactus/Succulent/Bonsai)A natural, coarse grade pumice that supports healthy root systems in larger pots and more mature plants. This pumice size is ideal for growers who require increased drainage and airflow while still maintaining nutrient holding capability. With pores that naturally absorb and slowly release water and nutrients, it helps create optimal growing conditions in bonsai, succulents, and cactus gardens. Features Coarse particle size: 420mm Excellent for

A natural, coarse-grade pumice that supports healthy root systems in larger pots and more mature plants. This pumice size is ideal for growers who require increased drainage and airflow while still maintaining nutrient-holding capability.

With pores that naturally absorb and slowly release water and nutrients, it helps create optimal growing conditions in bonsai, succulents, and cactus gardens.

Features

  • Coarse particle size: 4–20mm

  • Excellent for drainage and aeration

  • Retains water and nutrients in micro-pores

  • Fully washed and screened – no dust or fines

  • Sustainably sourced from a land-based site near Lake Taupo, NZ

  • Naturally sterile, pH-neutral, and chemically inert

  • Suitable for hydroponics, raised beds, pots, and dry-loving plants

Why You Should Buy

This coarser grade of pumice is especially well-suited to larger plants, including older bonsai and large succulents, which benefit from increased airflow around roots. Unlike soil additives that compact over time, this pumice maintains its structure long-term. Its superior drainage minimizes the risk of overwatering, while the porous surface helps hold just enough moisture and nutrients for gradual release, supporting stronger, more resilient plants.

Common Applications

  • Bonsai cultivation with a need for heavier drainage

  • Cactus and succulent soil mixes

  • Soil amendment for large pots or garden beds

  • Hydroponic growing as part of an inert medium

  • Soil conditioning in no-till gardening

FAQs

What’s the difference between this and the 1–7mm grade?
The 4–20mm grade has larger particles, offering even greater drainage and airflow, making it ideal for larger root systems or plants in bigger containers.

Is it pre-washed?
Yes, it's washed and screened to remove dust and fines, ensuring it won’t compact or “concrete” in your soil mix.

Can I mix this with organic potting soil?
Absolutely. It can be mixed directly with soil to improve structure and oxygenation.

Will this break down over time?
No, pumice is a long-lasting mineral aggregate that keeps its shape and function.

Can it be used in hydroponic systems?
Yes, it’s inert and pH neutral, making it perfect for hydroponic applications or as a base media layer.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 85533019554

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★★★★★ 5
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★★★★★ 3
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The shelving unit was not as I had expected. It arrived damaged. The damage is on the under side though. They are hollow and not hardwood as I had expected. Save your money if you want something of good quality. These are like 3 pieces of pressed wood glued together. They are space saving and look great in my space. The mounting hardware it comes with was plenty enough to hang these but make sure you hang them in the studs if at all possible. Assembly was simple. It does come with a micro level. Which a kid or pet could accidentally swallow. It’s like pill capsule sized so just be careful when opening the package.
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Reviewed in the United States on May 26, 2026
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MacWestie
Grantham, US
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Reviewed in the United States on April 17, 2026
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Megan Moore
West Palm Beach, US
★★★★★ 5
Good size and quality
Easy installation, been up on the wall for several months now and they're exactly what we were looking for. Pretty sturdy, good quality. First order of these came broken but they replaced them no problem.
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