House & Garden Soil B, 5 L

Soil-Specific Base Nutrient With Calcium, Part B, 5 L

A soil garden draws on nutrient availability and buffering that a straight hydroponic base feed isn't built around, which is why pairing a soil-specific formula with the right complementary half matters more than it might for an inert medium. House & Garden Soil B is the second half of the Soil A&B system, carrying a full spread of essential nutrients plus calcium, formulated for soil rather than adapted from a hydro chart.

The 5-liter bottle is built for a regular indoor soil grower running a complete feeding program through a full cycle.

Key Features & Benefits

• Pairs with Soil A — combine both halves in the ratio on the feed chart to complete the base feeding program.
• Includes calcium — delivers a meaningful calcium contribution alongside standard macro- and micronutrients.
• Built for soil — engineered around soil's nutrient buffering rather than a hydroponic reservoir.
• Scales with garden size — sold from 1-liter bottles up to 200-liter drums.

Who Benefits From the Soil A&B System

Soil growers looking for calcium-inclusive base nutrition purpose-built for soil, rather than a hydroponic formula stretched to cover a soil feeding schedule.

About House & Garden

House & Garden's nutrient line began in the Netherlands in 1990 under founder William Van De Zwaan and has been produced at a zero-waste manufacturing facility in Humboldt County, California, since the company's 2015 relocation, with distribution now reaching more than 30 countries.

Frequently Asked Questions

Can I use Soil B on its own without Soil A?

It's not recommended. Soil B supplies only half of the complete nutrient profile, so pairing it with Soil A in the ratio on the feed chart is what delivers full nutrition.

Is Soil B meant for hydroponic systems?

No, it's engineered specifically around soil growing rather than hydroponic or soilless media. Soil buffers nutrients differently than an inert medium, which is why House & Garden formulates separate soil and hydro lines.

How much calcium does Soil B provide?

Combined with Soil A, the two-part system delivers a meaningful amount of calcium alongside its other macro- and micronutrients. Most growers won't need to add a separate cal-mag product on top of the Soil A&B pairing.

What size options are available for Soil B?

Soil B ships from a 1-liter bottle up to a 200-liter drum, mirroring the size range available for Soil A. Matching sizes between the two makes it easier to reorder both halves together.

What's the correct way to dose Soil A and Soil B together?

Add both bottles to your reservoir or feed water at the same time, following the ratio and amounts printed on the House & Garden feed chart for your current growth stage. Dosing only one half leaves the feeding program short of complete nutrition.