Jonathan Green Green-Up Lawn Food (29-0-3, 5,000 sq ft) Review (2026)
By The DIYPicks Team · Updated July 2026
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- Cool season lawns
- Deep green color
- Long feeding
- Phosphorus free
A high-nitrogen synthetic feed for cool-season lawns that want deep color fast without a phosphorus load. The 29-0-3 controlled-release formula greens up quickly and keeps feeding up to 12 weeks, and the phosphorus-free mix meets many runoff rules. It can burn if you over-apply or spread it on a dry lawn, and it won't improve the soil like an organic, but for reliable color it delivers.
Pros
- High 29% nitrogen with controlled release drives a deep green-up that lasts up to 12 weeks
- Phosphorus-free formula complies with many state lawn-fertilizer runoff restrictions
- Even, dust-free granules spread cleanly and won't streak the lawn when applied as directed
Cons
- High nitrogen can burn if over-applied or spread on a dry, stressed lawn
- Synthetic feed does nothing to build soil biology the way an organic option does
- Must be watered in and kept off pavement to avoid runoff staining and waste
Specifications
| NPK | 29-0-3 |
|---|---|
| Coverage | 5,000 sq ft (15 lb bag) |
| Release | Controlled-release nitrogen feeds up to 12 weeks |
| Type | Granular synthetic |
| Phosphorus | Zero, meeting many state runoff rules |