Miracle-Gro Water Soluble All Purpose Plant Food (24-8-16) Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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4.7$18~$18 for 5 lb tub (Walmart/Home Depot); mixes into many gallons of liquid feedCheck Price on Amazon →
- All purpose
- Containers
- Flowers
- Vegetables
A cheap, fast, do-everything synthetic feed: this 24-8-16 water-soluble powder dissolves cleanly in a hose feeder or can and drives green-up within days on flowers, vegetables and containers. Catches of fast-release: you must reapply every 1-2 weeks, the high salt index can burn foliage if over-mixed so follow the label rates, and it adds no organic matter.
Pros
- Fast-acting: visible green-up and growth within days of feeding
- Dissolves fully with no clogging; use with a hose feeder or watering can
- Very versatile across flowers, vegetables, houseplants and container plants
Cons
- Fast-release means you must reapply every 1-2 weeks to keep plants fed
- High salt index can burn foliage/roots if over-mixed; follow label dilution rates
- Adds no organic matter and does nothing to build long-term soil health
Specifications
| NPK | 24-8-16 |
|---|---|
| Type | Synthetic water-soluble powder (mixed into liquid) |
| Release | Fast, feeds every 1-2 weeks |
| Coverage | 5 lb feeds ~2,000 sq ft via Garden Feeder |
| Best for | Quick all-purpose feeding of beds & containers |
Frequently Asked Questions
- How quickly does water-soluble plant food work?
- Visible green-up and growth within days, which is what makes it the standard rescue for a plant that is lagging. That speed is the entire reason to choose it over slow-release.
- How do you apply it?
- It dissolves fully with no clogging, so it works through a hose-end Garden Feeder or a plain watering can. A 5 lb box feeds roughly 2,000 sq ft through the feeder.
- What happens if you over-mix it?
- Burn. The high salt index scorches foliage and roots if the dilution is too strong, so follow the label rate rather than eyeballing it. It also needs reapplying every 1-2 weeks and adds no organic matter.