Jonathan Green Mag-I-Cal Plus for Lawns in Alkaline and Hard Soil
Designed to help lawns flourish where soil is alkaline and compacted, Mag-I-Cal Plus is an organic, phosphorus-free lawn conditioner from Jonathan Green that works with all grasses as part of an All Season Annual Program. The granular, bagged formula is sized for medium lawns and provides coverage up to 5000, making it a practical addition to care routines for lawns in multi-region conditions. Safe for Bermuda grass and not intended for vegetables.
Key benefits
- Organic, phosphorus-free formula supports healthy lawn growth without adding phosphorus.
- Granular, bagged application designed for even, in-ground distribution.
- Not water soluble; works through soil conditioning over time as part of an all-season program.
- Pre Emergent: Pre Emergent feature included as part of the product’s design.
- Safe for Bermuda grass and suitable for multi-region lawns.
- Seeding: Yes; compatible with seeding and overseeding projects.
- Container Size: 18; Coverage Area: 5000; Size of Lawn: Medium (4001 - 9999 sq ft).
- Application Season: All Season; Application Conditions: Dry.
- Region: Multi-Region; OMRI Certified: No; Water Soluble: No.
- Suitable for Vegetables: No.
How it fits into your lawn care routine
As part of the Annual Program, Mag-I-Cal Plus supports lawns across a range of grasses by addressing the challenges of alkaline and hard soils. This product is versatile for seeding projects and is designed to integrate smoothly with year-round lawn maintenance plans, helping you achieve a greener, healthier lawn with consistent, season-spanning care.