Best Urea Slow-Release Fertilizer Options for Lawns and Gardens
The closest match for a true slow-release nitrogen fertilizer is Greenway Biotech Nitroform 39-0-0, which lists a 3–4 month feeding period. GARDENWISE 10-10-10 is another slow-release option, but it is a balanced fertilizer rather than a urea product. The other three picks are 46-0-0 urea fertilizers for buyers who prioritize concentrated nitrogen and should not be mistaken for slow-release formulas.
| Product | Best For | Key Distinction |
|---|---|---|
| Greenway Biotech Nitroform | Extended nitrogen feeding | Slow release for 3–4 months |
| GARDENWISE 10-10-10 | Balanced, sustained feeding | Slow release for up to 8 weeks |
| Cz Garden Supply Urea | Small gardens and mixed uses | 46-0-0 water-soluble urea |
| Grow Co Urea | General high-nitrogen feeding | 46-0-0 formula |
| CountryMax Urea | Lawns and larger applications | 10-pound package, 46-0-0 |
Greenway Biotech Nitroform 39-0-0
Best for: Lawn owners and growers seeking an extended nitrogen feed. This is the clearest match for a slow-release fertilizer in the list. Its stated nitrogen composition is 3% urea nitrogen, 7.5% water-soluble nitrogen, and 28.5% water-insoluble nitrogen.
The product description says it supplies nitrogen for 3–4 months and notes reduced thatch development in turf applications and less risk of leaching. Choose it when a longer feeding period matters more than a 46-0-0 concentration. The package is 2 pounds, so it may be less suitable for treating a large area. Follow the label for application directions.
GARDENWISE Slow-Release 10-10-10
Best for: Gardeners who want slow-release feeding with nitrogen, phosphorus, and potassium. The granular formula contains 10% of each nutrient and is described as providing up to eight weeks of sustained nutrition. It is designed for a range of plants, including vegetables, flowers, shrubs, and fruit trees.
Choose this instead of urea when you want a balanced fertilizer rather than concentrated nitrogen alone. The listed package is a half quart, which may not meet the needs of a large lawn or garden. Its 10-10-10 analysis also makes it a different nutrient profile from 46-0-0 urea.
Cz Garden Supply 46-0-0 Urea
Best for: Indoor and outdoor gardeners who need a compact, high-nitrogen product. This 5-pound fertilizer is described as water-soluble and suitable for lawns, flowers, vegetables, and other garden plants. Its resealable pouch is useful for storing unused product.
This is a 46-0-0 urea fertilizer, not a listed slow-release formula. Choose it for concentrated nitrogen, not for the 3–4 month feeding period offered by Nitroform. The product description also mentions tie-dye and batik use, but gardeners should follow fertilizer directions for plant applications.
Grow Co 5-Pound Urea 46-0-0
Best for: Buyers who want a 5-pound package of concentrated nitrogen for grass, vegetables, fruit, or flowers. Grow Co describes its 46-0-0 formula as supporting lush growth and greener plant color.
It is a straightforward option for someone comparing high-nitrogen urea products. However, the supplied features do not identify a slow-release mechanism or a sustained feeding duration. Choose this for a 46-0-0 product, and avoid treating it as equivalent to a slow-release fertilizer without label confirmation.
CountryMax 10-Pound Urea 46-0-0
Best for: Lawn owners, landscapers, and growers who prefer a larger package of high-nitrogen fertilizer. The 46-0-0 product is described for lawns, gardens, crops, trees, shrubs, and ornamental plants, with rapid green-up as a stated use.
The 10-pound size may be more practical than a small pouch for broader applications. The listed features describe fast green-up, not slow-release feeding. Choose it for a larger supply of concentrated urea, and compare the label’s application instructions with the needs of your lawn or plants.
Buying Guide: How To Choose Urea Slow-Release Fertilizer
Do you need slow-release nitrogen or concentrated urea?
Check the fertilizer analysis and release claims rather than relying on the word “urea” alone. Urea products listed here have a 46-0-0 analysis and are presented as high-nitrogen fertilizers. Nitroform is the option that specifically describes a blend of nitrogen forms and feeding for 3–4 months. GARDENWISE offers sustained feeding but has a balanced 10-10-10 analysis.
How long should the fertilizer feed?
Compare the stated feeding duration with your application schedule. Nitroform lists 3–4 months, while GARDENWISE lists up to eight weeks. The other product descriptions do not specify a slow-release duration. For any product, follow its label for timing and amount instead of assuming all nitrogen fertilizers behave alike.
What nutrient balance do your plants need?
A 46-0-0 product supplies nitrogen without listed phosphorus or potassium. A 10-10-10 fertilizer supplies all three primary nutrients in equal percentages. Choose based on your plants’ needs and soil information; more nitrogen is not automatically the right choice for every garden or lawn.
How much product do you need?
Package sizes range from 2 pounds and 5 pounds to 10 pounds, while GARDENWISE is listed as a half-quart container. Estimate the area you plan to treat and use the product label to determine application rates. A larger package can be convenient for broad coverage, while a smaller one may suit a limited garden.
Frequently Asked Questions
Is urea fertilizer automatically slow-release?
No. The products listed as 46-0-0 urea do not state a slow-release period. Greenway Biotech Nitroform specifically describes slow-release nitrogen.
Which product lists the longest feeding period?
Greenway Biotech Nitroform lists a 3–4 month nitrogen supply. GARDENWISE lists up to eight weeks of sustained nutrition.
Is 10-10-10 the same as 46-0-0 urea?
No. 10-10-10 provides nitrogen, phosphorus, and potassium at 10% each. 46-0-0 is a high-nitrogen analysis without listed phosphorus or potassium.
Can I use these products on every plant?
Do not assume universal suitability. Product descriptions list intended applications, but the fertilizer label should guide use, dosage, and timing for specific plants and growing conditions.