A common ingredient used in gardening, or, rather, potting soil, is a substance called 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.

Can I use Styrofoam in potting soil?

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.

Can you grow plants in Styrofoam?

You can grow garden vegetables in most containers, but polystyrene boxes – like the ones you see at the fruit and veg shop – are ideal. They’re light, easy to manage, and the foam helps insulate the roots. Use deep boxes to give your vegies plenty of space to grow their roots.

What can be used instead of perlite?

• Rice husks.
• Pumice.
• Horticultural grit.
• Granite gravel.
• Vermiculite.
• Calcined clay.
• Bark.
• Peat.

What is the same as perlite?

Like perlite, vermiculite is an effective soil conditioner that can loosen compacted soil, provide drainage, and hold three to four times its weight in water.

Can you use polystyrene instead of perlite?

Soil and Plant Laboratory, Inc. Recently, some growers have tried using polystyrene beads or foam as a replacement for perlite. This plastic aggregate does have an appearance similar in color and particle size to perlite.

Can I substitute Styrofoam for 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.

Can I use sand instead of 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.

How do you make homemade perlite?

Mix equal parts of dry cement, sphagnum peat moss and perlite in a bucket or other container. Measure each ingredient by volume instead of by weight, so if you measure with a dry scoop, use an equal number of scoops of each ingredient.

Can you use gravel instead of perlite?

Unlike vermiculite and perlite, sand and gravel do not disintegrate over time. … That’s why I choose to use fine gravel as a substitute.

Article first time published on

Can I grow vegetables in Styrofoam?

Growing plants in foam containers is easy, and the bigger the container, the more you can plant. A small container is ideal for plants like lettuce or radishes. A five-gallon container will work for patio tomatoes, but you’ll need a 10-gallon (38 L) foam plant container for full-size tomatoes.

Can you plant tomatoes in Styrofoam cooler?

Styrofoam, like plastic, doesn’t breathe well. Without adequate drainage, tomatoes will easily contract root rot when moisture begins to build up at the bottom of the pot. Avoid this problem by drilling several holes into the bottom of the container before planting your tomatoes.

Is Styrofoam safe for hydroponics?

The short answer is yes; Styrofoam can be used in hydroponics without danger as it relates to the makeup of the styrene product. While the National Institute of Health has labeled styrene as a potential human carcinogen, it is not present in high enough levels in Styrofoam to be dangerous.

What are the disadvantages of perlite?

• Water can drain away quickly. …
• Being so lightweight, perlite can be blown away and tends to float in excess water.
• Nonrenewable resource. …
• Dust can create respiratory problems and eye irritation.

How do you make perlite soil?

Combine 1 part perlite and 1 part peat moss with 1 part compost, pasteurized garden soil — soil you have baked at 250 F for half an hour — or purchased bagged soil, usually labeled “Garden Soil,” from a nursery to create a potting mix suitable for containers indoors or out.

Can I use vermiculite instead of perlite?

Perlite and vermiculite are both used to improve moisture retention and aeration in soil. They are used in a similar manner, but they are not interchangeable.

Can I use polystyrene for plants?

However, it can have a second use when used in potting up large containers. … Planting up especially large pots and outsized, repurposed containers can be expensive as they require so much compost to fill them.

What does polystyrene look like?

Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and brittle. It is an inexpensive resin per unit weight. … As a thermoplastic polymer, polystyrene is in a solid (glassy) state at room temperature but flows if heated above about 100 °C, its glass transition temperature.

Does Styrofoam decompose?

It is one of very few materials that NEVER ever – yes that’s right – never, decomposes. While it may take a plastic bottle 450 years to decompose and a glass bottle 1 million, Styrofoam stays strong and doesn’t give in to the elements of nature, ever.

What can I use Styrofoam for?

• Use Styrofoam to Keep Nail Polish Nice. …
• Use Styrofoam to Hold Treats for Shipping and Freezing. …
• Use Styrofoam to Make a Floating Tray for the Pool. …
• Use Styrofoam to Make Your Own Shipping Pellets. …
• Use Styrofoam to Make a Kickboard. …
• Use Styrofoam to Help Shrubs Withstand Winter.

Can rice hulls replace perlite?

WEST LAFAYETTE, Ind. – Greenhouse plant growers can substitute rice hulls for perlite in their media without the need for an increase in growth regulators, according to a Purdue University study.

What is perlite soil 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.

What are the white balls in potting soil?

The small styrofoam-like particles in your potting soil are a mineral called perlite. It’s made when lava rock from volcanoes cools, trapping tiny quantities of moisture inside. Initially, it looks like glass (usually because of the crushing weight of the Earth on top of it).

Can you use rocks instead of perlite?

Yes! As mentioned above, many gardeners swear by using gravel or sand mixed in with their regular garden soil to improve drainage.

Can I use coco peat instead of perlite?

Coir and sphagnum peat both take up a lot of water. Coir retains water in the long run better than such growing mediums as perlite and rock wool, which suggests it will retain water longer in the garden as well. Both are excellent in trapping air in the soil, air that will benefit plant roots.

Is perlite toxic to humans?

Perlite is a naturally occurring silicous rock and as such, is not toxic. Perlite is used in horticultural, construction and industrial applications. Ingesting the products that incorporate perlite may cause illness and, in excessive amounts, permanent harm or death.

Is Pearl stone the same as perlite?

perlite, also called pearlstone, a natural glass with concentric cracks such that the rock breaks into small pearl-like bodies. It is formed by the rapid cooling of viscous lava or magma. Perlite has a waxy to pearly lustre and is commonly gray or greenish but may be brown, blue, or red.

Is rice hull good for plants?

For potted plants, a 10 to 50 percent ratio of rice hulls in your potting soil is adequate. … You can also use rice hulls as a mulch, just like you use straw to retain moisture and fend off weeds. Research has found that rice hulls provide effective weed control when mixed into the top ½ to 1-inch of soil.

Why do they put Styrofoam in potting soil?

Myth #2: Styrofoam Helps Keep Soil Loose and Aerated The white, foam-like balls in your potting soil are there to help keep soil loose and aerated, but they are most commonly made from a naturally occurring volcanic glass known as perlite.

Can you plant seedlings in styrofoam cups?

The Styrofoam won’t leach dangerous chemicals into the soil while you’re germinating your seeds, but remove the soil and seedlings from the cup when it’s time to plant them outside; don’t put the cup into the ground.

What do you put in the bottom of a planter for drainage?

Put a layer of gravel in your plant’s drainage tray, or down inside a decorative planter, then sit your plant pot on top. The gravel will hold water and increase humidity, while keeping your plant’s roots up out of the puddle.