Soil Additives

AG Limestone is an agent added to soil to help raise the pH without adding trace amounts of magnesium like Dolomite Lime.This Limestone contains 4% magnesium compared to Dolomite which is...

BuildASoil Worm Castings are simply the best bulk source of castings we have ever had the pleasure of working with, we often find living worms still inside the castings.Ôªø This stuff is wet and...

This orchid bark is excellent propagation and potting media for orchids. Its ideal soil cover for indoor and outdoor container plants. Great for air plants, epiphyte orchid species that grow on...

Soil conditioner that loosens soil, provides aeration and retains water. Can be used to start seeds, propagate cuttings and store bulbs. Blend with peat moss and perlite for custom soilless mix.

Lambert Horticultural Vermiculite is an aggregate used to increase water retention in your potting mixes. It is very useful to cover germinating seeds. In fact, its water-holding properties and its...

Beautiful Small Black Lava Rock looks like small/medium perlite and is much better.Please note that due to this products weight it is always shipped USPS.This small black lava rock comes with...

BuildASoil Craft Blend started with a big workshop full of the best and cleanest soil amendments available. I quickly became spoiled and would use all of the BuildASoil ingredients together and in...

Oyster Shell Flour is a high quality soil conditioner which consists of 96% calcium carbonate and many micronutrients, Oyster Shell Flour provides a long-lasting, steady release of nutrients to help...

Oyster Shell Flour is a high quality soil conditioner which consists of 96% calcium carbonate and many micronutrients, Oyster Shell Flour provides a long-lasting, steady release of nutrients to help...

Rice hulls are now available in smaller sizes for gardeners and small growers! This natural, sustainable, and renewable alternative to peat, vermiculite, and perlite makes an impressive growing media...

The difference? Thrive.N is 15-0-0 and this product just tested at 2-10-5 which is a HUGE number to hit for organic products. We have been searching for a product that will provide available P and K...

BuildASoil brings you sulfur that you can introduce into your soil as a soil amendment. Wettable sulfur, and sulfur in general, is a tool to lower the pH levels in soil. Too much, the soil shows too...