Best 5-10-10 Fertilizer: Low-N Formula for Root Crops, Flowers & Established Gardens Buy on Old Cobblers Farm
Not every garden needs a nitrogen push. The 5-10-10 ratio delivers double the phosphorus and potassium relative to nitrogen — exactly what root crops, bulbs, and flowering plants demand.
Old Cobblers Farm™ Wicked Growth 5-10-10 Fertilizer – Multi-Use Fertilizer
by Conventional Fertilizer — Littleton, NH
Built for Root Crops & Bulbs
Double the phosphorus and potassium relative to nitrogen. Ideal for carrots, beets, turnips, potatoes, tulips, daffodils, and other root-focused crops.
Bloom-Boosting P & K Ratio
10% phosphorus and 10% potassium fuel flower production and fruit set without pushing excess leafy growth that steals energy from blooms.
Low Nitrogen — No Overgrowth
Only 5% nitrogen prevents leggy, weak growth in flowers and root vegetables. Keeps plants compact, sturdy, and focused on production.
200–250 sq ft Per Bag
5 lbs covers a solid garden section at broadcast rate. Reapply 2–3 times per season for continuous feeding through harvest.
Perfect Fall Prep Fertilizer
Apply before planting fall bulbs or garlic. The P & K load builds root reserves heading into winter dormancy.
Versatile Garden Formula
Works for vegetables, flowers, shrubs, and new plantings. One bag handles multiple garden zones with different needs.
Legume-Friendly
Low nitrogen won't interfere with legume nitrogen fixation. Great for beans, peas, and cover crop mixes where excess N is counterproductive.
Trusted by 20,000+ Growers
Developed in Littleton, New Hampshire. Sold nationwide on Amazon, Walmart, eBay, and theoldcobblersfarm.com.
| NPK Ratio | 5-10-10 |
| Item Form | Granular |
| Coverage | 200–250 sq ft per 5 lb bag |
| Category | Conventional Fertilizer |
| Type | All-Purpose NPK Blends |
| Sizes | 5 lb | 10 lb | 15 lb | 20 lb |
| NPK | 5-10-10 |
| Nitrogen | 5% |
| Phosphorus | 10% available phosphate |
| Potassium | 10% soluble potash |
| Form | Granular |
| Rate | 2–3 lbs / 100 sq ft |
| Method | Broadcast or row application |
| Sizes | 5, 10, 15, 20 lb bags |
| Best For | Root crops, flowers, bulbs, legumes, fall planting |
| Feature | Old Cobblers Farm™ Wicked Growth 5-10-10 Fertilizer – Multi-Use Fertilizer Old Cobblers Farm | 5-10-10 Tomato & Vegetable Fertilizer CZ Garden Supply | 5-10-10 Tomato & Vegetable Fertilizer CZ Garden Supply | Morcrop Tomato & Vegetable Food Lilly Miller (Pennington) | Garden Food Espoma | All Purpose Plant Food Expert Gardener | 5-10-10 Fertilizer (Liquid) TPS Nutrients | 5-10-10 Tomato & Vegetable Fertilizer CZ Garden Organics | Active 5-10-10 Organic Ferticell / Rocky Mountain BioAg | Sunshine Harvest All Purpose 5-10-5 Just Scentsational |
|---|---|---|---|---|---|---|---|---|---|---|
| NPK | 5-10-10 | 5-10-10 | 5-10-10 | 5-10-10 | 5-10-5 | 5-10-5 | 5-10-10 | 5-10-10 | 5-10-10 | 5-10-5 |
| Form | Granular | Granular (resealable pouch) | Granular (resealable pouch) | — | — | — | — | — | — | — |
| Coverage | 200–250 sq ft per 5 lb bag | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed | Not listed |
| Price / Size | 5 lb | 10 lb | 15 lb | 20 lb | $19.99 (sale from $22.99) | $19.99 (sale from $22.99) | $10–$34 | $11–$19 | ~$18 | $12–$30 | $16–$30 | ~$279 | $19–$49 |
| Our Take | The ideal low-nitrogen formula for gardeners who need strong root d... | Closest NPK to ours (5-10-10) and strong Amazon presence. But 37% less nutrition per pound than 8-16-16. No ingredient transparency, no application rate. | Closest NPK to ours (5-10-10) and strong Amazon presence. But 37% less nutrition per pound than 8-16-16. No ingredient transparency, no application rate. | — | — | — | — | — | — | — |
5-10-10 Tomato & Vegetable Fertilizer
5-10-10 Tomato & Vegetable Fertilizer
Morcrop Tomato & Vegetable Food
Garden Food
All Purpose Plant Food
5-10-10 Fertilizer (Liquid)
5-10-10 Tomato & Vegetable Fertilizer
Active 5-10-10 Organic
Sunshine Harvest All Purpose 5-10-5
Built for Root Crops & Bulbs
Double the phosphorus and potassium relative to nitrogen. Ideal for carrots, beets, turnips, potatoes, tulips, daffodils, and other root-focused crops.
Bloom-Boosting P & K Ratio
10% phosphorus and 10% potassium fuel flower production and fruit set without pushing excess leafy growth that steals energy from blooms.
Low Nitrogen — No Overgrowth
Only 5% nitrogen prevents leggy, weak growth in flowers and root vegetables. Keeps plants compact, sturdy, and focused on production.
200–250 sq ft Per Bag
5 lbs covers a solid garden section at broadcast rate. Reapply 2–3 times per season for continuous feeding through harvest.
