Description
Premium Semi-PON Potting Mix | 2L
One product. Three ways to grow.
Our Premium Semi-PON Lava Mix is a versatile mineral growing medium that can be used as a complete semi-hydro growing medium, a gritty amendment to improve drainage in potting soils, or an attractive top dressing for your potted plants.
Made from a carefully balanced blend of premium mineral ingredients, it won’t break down like traditional potting soils and is ready to use straight from the bag.
Why we made this mix
Semi-hydro growing has become increasingly popular because it gives growers more control over watering and nutrients while creating excellent conditions for healthy root growth.
But we wanted to create something that could do more than just replace soil.
That’s why our Premium Semi-PON Lava Mix is designed to be just as useful mixed into potting soil or used as a decorative top dressing as it is in a semi-hydro setup.
One bag.
Three practical uses.
Three ways to use it
Semi-hydro growing
Use it as a complete soil replacement for semi-hydro growing.
The porous mineral particles absorb moisture while leaving plenty of air space around the roots. Because the mix contains no organic material or added fertilizer, you have complete control over your feeding program.
Soil amendment
Not every plant needs to be converted to semi-hydro.
Blend Premium Semi-PON Lava Mix into your favourite potting soil to improve drainage, increase airflow and add long-lasting structure that won’t break down over time.
It’s an easy way to create a grittier, more durable potting mix without buying several different mineral ingredients.
Decorative top dressing
Premium Semi-PON Lava Mix also makes an attractive top dressing for potted plants.
The natural mineral finish gives containers a clean, finished appearance while helping reduce soil splash during watering.
Many growers also use mineral top dressings as part of an integrated approach to discouraging fungus gnats by creating a drier, less inviting surface for adult gnats to lay eggs. While no top dressing completely prevents pests, it can be a helpful addition alongside proper watering practices and other pest management methods.
Why choose a mineral growing medium?
Traditional potting soils slowly break down over time.
As they decompose, they can become finer, reducing drainage and air space around the roots.
Mineral growing media maintain their structure for much longer, helping provide more consistent drainage and oxygen around the roots over time.
Great for
- Semi-hydro growing
- Monstera
- Philodendron
- Anthurium
- Alocasia
- Hoya
- Orchids
- Rooted cuttings
- Propagation
- Soil amendments
- Decorative top dressing
Complete Ingredient List
- Pumice
- Green Zeolite
- Black Lava Rock
- Red Lava Rock
- Maifanitum
Every bag is hand mixed individually.
We don’t make giant batches and divide them into bags.
Every Plant King bag is hand mixed individually using the same recipe before it’s packaged.
It takes longer, but it helps keep every bag consistent from the first scoop to the last.
How to use
For semi-hydro
Rinse the mix before first use to remove any dust created during packaging and shipping.
Transfer your plant into an appropriate semi-hydro container and feed with a complete nutrient solution suitable for semi-hydro growing.
As a soil amendment
Blend into your existing potting mix to improve drainage and increase long-term structure.
Adjust the amount based on your plant’s needs and growing conditions.
As a top dressing
Spread an even layer over the surface of the soil to create a clean, decorative finish.
As part of a complete pest management approach, a mineral top dressing can also help make the soil surface less attractive for fungus gnats to lay eggs.
Frequently Asked Questions
Is Semi-PON Lava Mix the same as LECA?
Not quite.
LECA is made from expanded clay balls. Our Semi-PON Lava Mix is a blend of premium mineral ingredients with smaller particle sizes and water-holding properties, creating a finer, more balanced growing medium that many growers find easier to work with.
What plants grow well in Semi-PON?
Semi-PON is a great choice for many tropical houseplants, including Monsteras, Philodendrons, Anthuriums, Alocasias, Hoyas, Orchids, Syngoniums, Scindapsus and many rooted cuttings. As with any growing method, some plants adapt more easily than others.
Can I transfer an established plant into Semi-PON?
Yes. Many established plants transition successfully. During the transition, it’s normal for some older soil roots to die back while the plant develops new roots better suited to a semi-hydro environment.
Does Semi-PON contain fertilizer?
No. Semi-PON contains no added fertilizer, giving you complete control over your feeding program. When growing plants entirely in Semi-PON, use a quality nutrient solution suitable for semi-hydro growing according to the manufacturer’s directions.
100% Money Back Guarantee
We’re confident you’ll love your Plant King Premium Semi-PON Lava Mix.
If you’re not completely satisfied, let us know and we’ll make it right with our 100% Money Back Guarantee.












Christa –
I got this as a free product and although I’ve never done semi-hydro, I think its a really cool mix. It’s really colourful so I used it as a topper and it looks really good. I didn’t use the whole bag, going to use it as a soil ammendment as recommended and I can definitely see how it will increase drainage.