Discover the best rice hulls in the business.
PBH Nature’s Media Amendment is a uniquely processed rice hull product from Riceland Foods, Inc. with multiple uses in the greenhouse and nursery environment. For greenhouse production, it is the perfect replacement for perlite in the growing mix. In nursery stock, PBH is used as a container topdress to prevent airborne weed seeds from reaching the growing mix. Highly compressed when packaged in your choice of a 30-cu.-ft. bag or a 50-lb.-bale, PBH Nature’s Media Amendment lowers freight costs, generates less waste and minimizes storage and handling. It is a natural by-product of rice and a renewable resource with much to offer greenhouse growers, nurserymen, consumers and the environment. PBH is OMRI Listed® and WSDA registered.
Use PBH Nature’s Media Amendment to replace perlite.
- Lower basic cost than perlite
- Creates optimum porosity, drainage and stability
- Requires little or no adjustment to fertility and irrigation
- Dramatically less dusty than perlite
- About one-third few deliveries than perlite – 7 PBH truckloads versus 10 of perlite
- Less freight, labor, storage and packaging
- Natural color blends well with other media components
Use PBH Nature’s Media Amendment as a container topdress.
- Topdressing with 1 to 2 inches dramatically improves weed control for just pennies per container
- Significantly reduces hand-weeding labor and expense
- Improves control of moss species such as liverwort
- Reduces potential for drought stress and watering
- Delivers economical, earth-friendly weed management
PBH Rice Hulls Topdress Calculator
To calculate the amount of PBH needed to topdress a specific size and number of containers to a preferred depth, click here and simply fill in the information requested in the yellow spaces. The recommended topdressing depth is 1 to 2 inches per container.
News & Publications
- Article: "Rice Hulls for Weed Control in Container Crops"
- Article: "Parboiled Rice Hulls in Propagation Substrates"
- Article: "Using Parboiled Rice Hulls in Substrates to Finihs Greenhouse Crops"
- Brochure: Topdress with PBH for improved weed control.
- Press Release: "PBH Nature's Media Amendment goes organic with OMRI listing"
- Press Release: WSDA Registers PBH for Organic Agriculture Use
- Article: "Rice Hulls 101" (Article provided courtesy of Grower Talks magazine)
- Press Release: PBH Nature's Media Amendment Bulks Up Bale Size
- Press Release: Rice Hull Media Amendment Offers Horticultural, Economical and Environmental Advantages
- Article: "Looking for Cheap and Easy Ideas" (Article provided courtesy of Grower Talks magazine)
- Brochure: PBH Nature's Media Amendment
PBH Nature’s Media Amendment is available in your choice of compressed 50-pound or 30-cubic-foot bales. For packaging and mixing specifications, click here.
With four million containers in production, Tom Demaline, owner of Willoway Nurseries, uses PBH Nature’s Media Amendment as both a container topdress and a media amendment.
“We topdress containers with PBH at potting to ensure season-long weed control and significantly reduce hand weeding. With increasing labor costs and unpredictable weather patterns, we were looking for just such a tool to supplement our herbicide program. We also use PBH in our mix to maintain porosity. It works two ways for us.”
Joe Moore, head grower for Lucas Greenhouses, opted to try PBH because he liked the fact that it was a natural by-product. In doing so, he discovered numerous other benefits, including a lower input cost.
"We decided to trial PBH initially because it is a renewable resource and a natural by-product. An added bonus was the fact that it is relatively dust free in the soil mixing process, especially when compared to perlite. Both of these things are very important to us. During the trials, we produced crops that were every bit as good as what we had been growing — or even slightly better. For these reasons, we now use PBH in all our spring bedding plants, fall crops and our 6" poinsettias. We are seeing very high quality plants and saving roughly $4 per yard of mix versus perlite. That includes the cost of freight form Arkansas to New Jersey."
Patrick Bellrose, president of Fahr Greenhouses, converted his entire operation to PBH after trying the product and quickly realizing its many benefits. The list of advantages he cites include lower cost, lack of Pythium, better root development, less dust and sustainability.
"We tried composted rice hulls several years back, but with poor results. Then I heard Dr. Evans from the University of Arkansas speak and decided to try the PBH product. I received a sample in 2005 and by May 2006 we were 100% PBH instead of perlite. Many things attracted me to it. Cost was one, but beyond that was root development and the total lack of Pythium — even in our Vinca crop. We also like PBH because it is a natural product and we can promote its sustainability. Another real advantage is the lack of dust when mixing."
Pork and Plants Greenhouse
Eric Kreidermacher, the owner of Pork and Plants Greenhouse in Altura, Minnesota, finds PBH Nature's Media Amendment the perfect amendment for his coir-based mix. The nursery grows all of its own plant material and sells primarily to a retail market.
"We are always looking for new and better and we like the idea of being totally natural. PBH is a very accessible natural product that is weed free and easy to use. Perlite particles are fine and dusty, which can be a real nuisance. There is none of that with PBH. We have done away with perlite and gone to PBH because it is easier to work with, less costly and gives us the porosity and drainage characteristics the plants need."
Pork and Plants Greenhouse
Michael R. Evans of the Department of Horticulture at the University of Arkansas researched the use of parboiled fresh rice hulls as an alternative to perlite in horticultural substrates and determined the following:
- Incorporation of parboiled rice hulls into Sphagnum peat-based substrates did not result in significant nitrogen tie-up.
- Parboiled fresh rice hulls were free of viable weed seed.
- When incorporated into Sphagnum peat-based substrates, parboiled fresh rice hulls did not negatively impact the chemical properties of the substrate.
- When incorporated into Sphagnum peat-based substrates, parboiled fresh rice hulls provided equivalent or higher levels of drainage and air-filled pore space than perlite. (See Table 1.)
- Root and shoot growth was similar for plants grown in Sphagnum peat-based substrates amended with equivalent amounts of perlite or parboiled fresh rice hulls.
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