About Us

Established in 1970 as Peirano Topsoils, Greatsoil is a trusted local soil supplier in San Diego County, family-owned and operated. We source the finest soils that are best suited for homeowners, landscapers, and nurseries.

For over 50 years, Greatsoil has delivered premium horticultural soil mixes and products to local growers, including mulches, composts, and soil amendments – all of which are expertly conditioned to perform the selected functions.

From row crop agriculture to specialty markets, Greatsoil has developed technologies that provide environmentally sound solutions for professional plant growers. We understand that your business depends upon the quality of the soil you grow in. By providing optimum soil for a rich growing environment, Greatsoil’s products will help you achieve the outcomes you want consistently, efficiently, and effectively.

Our Services


We understand that strong roots require good soil. The care with which we develop each yard of living soil reflects our commitment. At Greatsoil, you can choose from 65 different types of soils

Learn More

Soil amendments

Our amendments are conditioned to improve the soil’s physical features, such as water retention, permeability, water infiltration, drainage, aeration, and structure. Our primary goal is to help you create a rich environment for the roots.

Learn More

Bark or Mulch

Bark and mulch are important components in maintaining the beauty of your plants. Each has the ability to insulate the ground, retain moisture in the soil, deposit nutrients, and limit weed growth. We offer nine different mulches – more than any other supplier in San Diego

Learn More

Crushed Rock

Crushed Rock is long-lasting and can be used as a ground cover in xeriscapes or rock gardens where turf grasses or other living ground covers are difficult to keep up with or are undesirable. Contact  Greatsoil for crushed rock products. We offer next-day delivery

Learn More

Planting Mixes

Our optimum planting mixes are nutrient-rich. We have a variety of options to choose from that complement different horticultural conditions and necessities. Greatsoil can create any custom mix on request. We offer specialty mixes, too.

Learn More

Sod and Seed

Sods and seeds lead to beautiful, healthy, sustainable lawns with proper care. We are happy to assist in your selection of the best sod for your needs.

Learn More