Soil Additives

Lambert Horticultural Perlite 8 Dry Qt

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 different combinations that aren't available here online...

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 regulate pH levels, improve fertilizer uptake, promote...

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 when mixed with compost or your favorite potting soil...

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 much salt, and the plants suffer, so measurement and...

Gardeners have long known that there's magic in worm castings. Use to enrich potting soil with active biology and plant ready minerals or top-dress your indoor container plants to give them a boost. Castings can also be brewed into a quick compost tea by...

For Seed Starting or blending a custom potting mix. Helps loosen heavy soils and prevents compaction

We have done thousands of soil tests and over the years and we've noticed that our particular soils are usually very high in Iron but very low in manganese and 5 other Micro-nutrients like Boron, Cobalt, Copper, Molybdenum and Zinc! Once you regain...

GROW!T horticultural clay pebbles are made from 100% natural clay. They are clean, pH stable, and offer great aeration and drainage in hydroponics, especially in flood and drain, deep water culture, and drip feed systems. Due to their unique structure...

 Lightweight soil conditioner (white, powdery material) that loosens clay soil, reduces caking, and improves drainage and aeration. Can be used to start seeds, propagate cuttings, and store bulbs. Blend with peat moss and vermiculite for custom...