
- Rice husks.
- Pumice.
- Horticultural grit.
- Granite gravel.
- Vermiculite.
- Calcined clay.
- Bark.
- Peat.
What is a good substitute for perlite?
Depending on how coarse it is, sand can work as a substitute for perlite. Sand is similar to perlite in that it is pH neutral, sterile, nutrient-free, and facilitates drainage. Unlike perlite, sand does not disintegrate over time, and although it absorbs water initially, it does not retain it, especially the coarser varieties.
What are the uses of perlite?
Perlite is particularly useful in plant propagation, including taking cuttings and sowing seeds. Other materials that perform similar functions are vermiculite, grit and sharp sand. Perlite helps aid drainage at the same time as retain water.
How do I use perlite in my garden?
Therefore you can use it in a number of ways: Succulents and other plants sensitive to moist soil benefit from having perlite added to the potting compost. The perlite will trap air in the compost and encourage water to drain through, ensuring the plant’s roots will never sit in damp soil. Mix perlite with compost at a ratio of around 1:4.
Can you use vermiculite and perlite together?
You can use vermiculite and perlite together – mixing a little perlite into a seed sowing mix will ensure plenty of oxygen gets to the roots, while a topping of vermiculite will lock the moisture in. Perlite is dusty, so take care to avoid inhaling the dust.

What's a good alternative for perlite?
PBH rice hulls are proven alternative to perlite. In recent years, as greenhouse growers have embraced sustainability and looked for feasible ways to reduce production costs, the use of parboiled rice hulls in greenhouse growing media has become a popular substitute for perlite.
Can you use Styrofoam instead of perlite?
However, since some people have difficulty obtaining perlite for a variety of reasons, some gardeners may be interested in substituting other materials. One such material is Styrofoam. According to many experienced gardeners, Styrofoam can be used instead of perlite.
Is sand an alternative to perlite?
Sand is an excellent alternative to perlite because it does not hold onto water and provides sharp drainage. However, it is not comparable in weight because it is much heavier.
Can gravel replace perlite?
One perlite substitute is granite gravel that looks a lot like perlite and can be used in a similar way. Both perlite and granite gravel is processed from porous rocks and both are great for retaining moisture in the soil. They also both keep the soil aerated and prevent the soil from becoming overly compacted.
Can I use cat litter instead of perlite?
Kitty Litter (unused!) better than Perlite. and cheaper too. My seedlings do really well now that I've switched to kitty litter.
What can I use to fill the bottom of a large planter?
6 Alternatives to Soil to Fill the Bottom of a Large PlanterRecycled Plastics. As we all probably know, plastic pollution is now a serious environmental issue. ... Packing Materials. ... Metal Cans. ... Plastic Pots. ... Natural Materials. ... Waste Paper and Cardboard.
Can I use pumice instead of perlite?
Yes, pumice can be an alternative to perlite due to its better porosity and soil drainage capabilities.
Do I need perlite?
Because perlite drains and aerates, it's often used with cacti, succulents and plants that need to dry out between watering. Perlite is also good for mixing with clay soil in the garden. With seed-starting, vermiculite can protect seedlings from fungal diseases and retain moisture.
What is perlite made of?
Perlite is made from a mined volcanic glass of the same name. As a raw material it contains water, trapped by the rapid cooling of lava. The moisture vaporizes explosively when heat is applied.
Can you use small rocks instead of perlite?
Perlite can be substituted with pumice, horticultural grit, poultry grit, sand, coarse vermiculite, gravel, clay pebbles, crushed shell, cactus mix with pea gravel, calcined clay, coco coir, wood chips, and rice hull because of their ability to retain water, provide air spaces, and improve the soil structure and ...
Is perlite just a rock?
Also known as expanded pyrite, perlite is a mined volcanic rock that is mixed into many industrial building products for stability, such as masonry construction, loose-fill insulation, cement, and plaster.
Can you use grit instead of perlite?
Perlite and horticultural grit have similar uses and can be used by themselves or together in different proportions. Perlite is used for better aeration, whilst vermiculite is used for more water retention.
What is the difference between perlite and Styrofoam?
Perlite produces higher total porosity, water retention and wet bulk density compared to the two forms of polystyrene.
Can I use Styrofoam in potting soil?
"Styrofoam does not break down, so we don't advise using it in potting soil," Wolgamott said. Unfortunately, local recycling centers do not accept Styrofoam. "It is very difficult and expensive to recycle Styrofoam," Wolgamott said. Wolgamott says to use corn starch packing peanuts in gardens.
Is Styrofoam safe for plants?
In pots with little to no drainage, the area of Styrofoam may be waterlogged and cause these plant roots to rot or die. Styrofoam also contains no nutrients for plant roots to absorb. Too much water and lack of nutrients can cause beautiful container designs to suddenly wilt and die.
Is it safe to grow vegetables in Styrofoam containers?
Bottom Line on Foam Foam doesn't break down easily in the environment, which means it's unlikely to degrade in a vegetable gardening container so it's safe to use as filler.
What is a substitute for perlite?
Vermiculite is another substitute for perlite. It is a highly absorbent mineral. Just like sand, it has many similarities with perlite. These are:
What is Perlite?
Perlite is a granular substance that does not decompose. It is mixed with the soil to improve the soil’s structure. It is a highly recommended substance that does not even change its shape when it is added to the soil.
Why add perlite to potting soil?
Due to its non-decomposition characteristic, it is perfect for potting mixes. When you add perlite, the soil becomes more porous. Thus, the draining capacity is enhanced. Moreover, the soil becomes loose and compaction is defied. This makes roots a happy camper as they can now grow easily.
What is grit made of?
Grit is commonly made up of small stones. These stones range from 2mm-4mm in size. It can also improve soil health and play its role in the proper development of plants and become a perlite substitute. However, it is heavier than perlite.
Can you use cat litter in potting mix?
Many people don’t know this but we can use cat litter in a potting mix. It can prove to be an excellent substitute for perlite due to the advantages it brings to the table. Let’s take a look at the reasons why we think kitty litter is good for houseplants:
Can sand be used as a perlite?
Sand can be selected as a perlite substitute. Sand and perlite have many similarities like:
Is Perlite a good medium for growing plants?
If you are growing plants, then you want the best possible growing medium for them. One cannot expect a good yield without any proper medium. However, sometimes a good growing medium is either not accessible or too expensive to buy. In that case, we must start to look for substitutes. One perfect example of this is the Perlite substitute. A good gardener always has a backup if any emergency occurs.
What is a good alternative to perlite?
Perlite Alternatives. Styrofoam is an economical alternative to perlite, according to the University of Connecticut. Similarly, it is lightweight, but differently, and it compresses over time instead of retaining its airy properties.
What is the function of perlite?
Perlite. Having the opposite function of vermiculite, perlite does not absorb and retain water. It increases drainage and improves aeration. Perlite, a volcanic mineral, pops like popcorn when heated, increasing its surface area up to 13 times more than its raw mineral state.
What is vermiculite in potting soil?
Like perlite, vermiculite is a mined mineral that is heated to yield a soilless ingredient of potting mixes. Unlike perlite, vermiculite absorbs and retains water and nutrients. This quality is desirable especially in container gardens because of their quicker evaporation rates compared to in-ground plantings.
Why is vermiculite called vermiculite?
From the Latin “vermiculare,” which means to breed worms, vermiculite is so-named because of its heat-expanded appearance. According to the United States Geological Survey, its mineral composition is magnesium-aluminum-iron silicate, and it resembles mica because of its shiny flakes.
What is the best substitute for vermiculite?
Vermiculite Alternatives. Finely ground pine bark, also called “pine fines,” is a principal ingredient of most potting mixes. As an alternative to vermiculite, pine fines also offer water-retentive qualities, especially with smaller particle sizes.
Does perlite absorb water?
Having the opposite function of vermiculite, perlite does not absorb and retain water. It increases drainage and improves aeration. Perlite, a volcanic mineral, pops like popcorn when heated, increasing its surface area up to 13 times more than its raw mineral state. It also has insulating properties, which protect root systems against fluctuations in soil temperature. Because it is so lightweight, perlite lessens the weight in containers, which makes them easier to lift, move and hang.
Can rice be substituted for perlite?
Rice hulls share similar physical properties with perlite and may be substituted for it in fresh or parboiled forms . Because parboiling rice subjects it to steam pressure, which kills all weed or rice seeds, it is preferred over fresh rice in potting mixes.
What Is Perlite?
Perlite is an inorganic substance added to potting soil to help aerate it.
Why is perlite used in soil?
However, since perlite mixtures are highly porous and readily allow water to drain , the amount of water it helps retain is limited.
What is the best drainage material for a house?
Sand: Sand also works well to provide good drainage, but it is much heavier than perlite.
Can you use styrofoam as a substitute for perlite?
You’ve heard you can use Styrofoam as a substitute, but you aren’t sure it will work. You need to know the facts. The truth is that Styrofoam will work as a substitute for perlite. But it must be the correct kind of Styrofoam, or, rather, the correct form of Styrofoam, such as thick Styrofoam meat trays, which we’ll discuss below.
Can you use packing peanuts?
Packing Peanuts: Do not use packing peanuts. They won’t work. They are actually filled with too much air and decompress too readily. Thick Styrofoam Meat Trays: One of our sources claims that thick meat trays, cut up into strips and then put through a blender with water, work remarkably well.
How much is perlite at Home Depot?
Uhhh nooo, if you can't afford perlite I'd just save up. It's 4 dollars a bag at Home Depot. You don't need name brand for perlite.
Why does perlite come to the top?
The perlite comes to the top as it is less dense than dirt. I actually find this unintentional layer of perlite that comes to the top to be beneficial. Small soft bodies insects dont like it cause it cuts them up and scratches them so they cant get under it to lay eggs. I would leave it and add more!
Is styrofoam safe to grow?
Styrofoam is supposed to be safe to grow vegetables in , so I imagine they'd be safe to grow weed in... however since OP's problem is that it accumulates at the top, this wouldn't be a very good solution. Also if you're using lights that get hot I would be even more wary of using styrofoam.#N#I've been researching into alternatives as well, rice hulls, sand, pebbles all mentioned seem like valid options. Also have heard of using soil made from bark fines, which is more aerated than regular potting soil. I'm actually really curious about the kitty litter thing, though I can't find a lot about it. Since it's clay does it not just retain water?
Do you have to choose just one grower?
Thats the best part...you dont have to chose just one. You just have to figure out what works best for you and your situation. Every grow is different and every grower is different. Its a beautiful thing.
Do bugs get into soil with perlite?
i always liked the perlite on the top the bugs never get into the soil or mold .
Does bark fines sequester nitrogen?
you do NOT want anything based with bark fines, absolutely not, will sequester nitrogen, and drive your ph down as well.
What is perlite?
Perlite is a lightweight granular material that’s white in colour. It looks and feels like little bits of polystyrene but is actually made from expanded volcanic glass, heated to 1000°C until it ‘pops’ (like popcorn) to many times its original size. It’s lightweight, sterile, and easy to handle, and is long-lasting. It’s neither alkaline nor acidic.
How to use perlite for seed?
Use perlite in seed sowing. Mix perlite into seed and cuttings compost at a ratio of 50:50 to create a moist environment perfect for delicate seedling roots . A fine layer of perlite is also excellent for covering seed that needs light to germinate because the perlite lets light through whilst still keeping the seed moist and aiding germination.
How to root a cutting in perlite?
Cuttings can also be rooted in perlite on its own. Moisten the perlite and fill a polythene bag around a third full. Prepare softwood or semi-ripe cuttings by cutting just below a leaf joint and removing the leaves on the lower half to two-thirds of the cutting. Insert the bare lower part of the shoot into the perlite, fill the bag with air and seal the top. After several weeks, roots should start to form. Once roots are well developed, the cutting can be taken out and potted up in compost.
What is the best way to keep cuttings from rooting?
Perlite can aid water retention in compost, which can help improve the chances of your cuttings taking root. To do this you need a compost that’s specifically designed for cuttings (with a finer texture and lower nutrient content than general use multi-purpose compost). Mix in perlite at a ratio of 50:50, fill the pots, water thoroughly and then allow the compost mix to drain for several hours before inserting your cuttings.
Why use perlite in potting soil?
Use perlite to aid drainage. Succulents and other plants sensitive to moist soil benefit from having perlite added to the potting compost. The perlite will trap air in the compost and encourage water to drain through, ensuring the plant’s roots will never sit in damp soil.
Which is better, perlite or vermiculite?
Vermiculite is better for water and nutrient retention than perlite and is best used for plants that need more moisture to grow. Vermiculite also protects seedlings against damping-off and other fungal diseases.
Can you use perlite and vermiculite together?
You can use vermiculite and perlite together – mixing a little perlite into a seed sowing mix will ensure plenty of oxygen gets to the roots, while a topping of vermiculite will lock the moisture in. How to use vermiculite.
What is Perlite?
Perlite is the name of a naturally occurring mineral. In nature, it exists as a type of volcanic glass, created when the volcanic obsidian glass gets saturated with water over a long time.
How is Perlite Made?
The processed perlite that we see in gardening mixes is basically “ volcanic popcorn .” That is a very literal description.
Is Perlite Organic?
From a chemistry perspective, organic compounds are those that contain carbon. Perlite does not contain carbon, so it is an inorganic mineral.
Where can you buy Perlite?
You can get perlite in significant amounts and many varieties at Home Depot, Lowes, your local nurseries, any hydro shops. Or order online at Amazon, eBay.
Why is perlite important for gardening?
There are several reasons why perlite is such a useful additive to gardens and hydroponic setups. They mainly stem from its unique physical and chemical properties : Perlite is physically stable and retains its shape even when pressed into the soil. It has a neutral pH level.
What does perlite mean in farming?
Perlite is a mined mineral that undergoes some physical processing.
How hot does perlite need to be to be crushed?
To complete the transformation, crushed perlite needs to be heated quickly to 900 degrees Celsius (around 1650 degrees Fahrenheit). The mineral structure is softened by the heat, allowing the water trapped inside to expand into steam in a bid to escape. The process leads to expansion of the crushed pieces of the mineral.
