Best Water-Soluble Nitrogen-Rich Fertilizers for Plants and Lawns
The best water-soluble nitrogen-rich fertilizer depends on where and how you plan to apply it. For mixed gardens, consider Plantco’s spray-grade urea or Cz Garden Supply’s granular urea; for a lawn, Simple Lawn Solutions offers a ready-to-use attached sprayer. GS Plant Foods is a plant-based powder option, while TPS Nutrients provides a small liquid nitrogen product for plant care.
| Product | Best For | Form |
|---|---|---|
| TPS Nutrients Nitrogen | Small-scale plant feeding | Liquid |
| Cz Garden Supply Urea | Gardens and general use | Water-soluble prills |
| Plantco Urea | Mixing liquid urea or foliar spray | Spray-grade prills |
| Simple Lawn Solutions 28-0-0 | Lawn feeding | Liquid with attached sprayer |
| GS Plant Foods Amino Power | Plant-based nitrogen feeding | Water-soluble powder |
TPS Nutrients Nitrogen Liquid Fertilizer
This 8-ounce liquid fertilizer is formulated to supply nitrogen, an essential plant nutrient associated with leafy growth and green foliage. The listing describes it as supporting plant vitality and steady development.
Best for: Growers who want a compact liquid nitrogen product for plant care. It was selected as a straightforward option focused on nitrogen support rather than a listed blend of multiple primary nutrients.
Consider: The supplied product details do not state a nitrogen analysis, coverage, or dilution rate. Check the package directions before mixing or applying, and avoid assuming it can be used at the same rate as another liquid fertilizer.
Cz Garden Supply 46-0-0 Urea
This 5-pound bag contains water-soluble 46-0-0 urea prills. Its listing names indoor flowers, lawns, vegetables, fruit, and citrus among potential uses. The resealable pouch is designed for pouring and storage, and the product is also marketed for tie-dye and batik projects.
Best for: Gardeners who want a concentrated, granular nitrogen source for a range of garden settings. The 46-0-0 analysis makes it distinct from balanced fertilizers that also supply phosphorus and potassium.
Consider: Urea is a concentrated nitrogen fertilizer, so follow the label’s application and dilution directions. Avoid choosing it if you need a product that also provides the other primary nutrients.
Plantco Spray-Grade Urea 46-0-0
Plantco’s urea prills are presented as a water-soluble 46-0-0 nitrogen fertilizer for indoor and outdoor plants. The listing says the package can make 36 gallons of liquid urea and describes use for flowers, vegetables, herbs, fruits, and lawns.
Best for: Buyers who prefer to mix a water-soluble nitrogen product for liquid application. It was selected for its spray-grade format and stated range of plant uses.
Consider: The stated 36-gallon yield is package information, not a universal application rate. Use the product label for the correct concentration and application method for your plants.
Simple Lawn Solutions 28-0-0 Lawn Food
This 32-ounce liquid lawn fertilizer contains 28% nitrogen and includes an attached sprayer. The listing states that the sprayer covers up to 3,200 square feet. Its nitrogen is described as 70% quick-release and 30% slow-release, combining a faster nutrient portion with a portion intended to feed between applications.
Best for: Lawn owners who want a lawn-specific product with an attached application sprayer. The stated coverage and release split help distinguish it from concentrated prills that must be mixed.
Consider: This is the most lawn-focused choice in this group, not the best fit for someone seeking a general-purpose dry fertilizer for containers or garden beds. Follow label directions for lawn application.
GS Plant Foods Amino Power Powder
Amino Power is described as a fully water-soluble, plant-based nitrogen powder containing 18 L-amino acids. The listing says it dissolves in water and can be applied to turf, vegetables, fruits, trees, and shrubs, including as a foliar spray. It is also described as a chelating agent that can support micronutrient uptake.
Best for: Buyers looking for a plant-based nitrogen source that can be used alongside other nutrients. Its powder form and listed range of application options make it a flexible alternative to urea prills.
Consider: The supplied details do not state the nitrogen percentage or mixing rate. Check the product label, especially when combining it with other fertilizers.
Buying Guide: How to Choose a Water-Soluble Nitrogen Fertilizer
What are you feeding?
Match the product to the application. Simple Lawn Solutions is specifically presented as lawn food and includes an attached sprayer. The urea and amino-acid products list broader potential uses, including garden plants. Always confirm that the label includes your intended plant and application method.
Do you want a liquid, powder, or prill?
Ready-to-apply or sprayer-equipped liquid products may simplify application, while powders and prills require mixing. A dry product can suit buyers who want to prepare their own solution, but measuring and mixing accurately matters. Do not assume every water-soluble fertilizer is suitable for every sprayer or foliar use.
How much nitrogen does the analysis provide?
Compare the numbers on the fertilizer label. The products listed here include 46-0-0 urea and 28-0-0 lawn fertilizer, while the supplied details for TPS Nutrients and Amino Power do not give a nitrogen analysis. A higher nitrogen percentage does not by itself determine the correct dose; follow the product’s directions and your plants’ needs.
Does the product provide other primary nutrients?
All three numbers in a fertilizer analysis describe nitrogen, phosphorus, and potassium. A 46-0-0 or 28-0-0 product supplies nitrogen as its stated primary nutrient but does not list phosphorus or potassium. If plants need those nutrients too, select a suitable complementary fertilizer based on the label and soil or plant requirements.
How should you apply it safely?
Read the label for mixing rates, timing, and permitted application methods. Avoid applying more than directed: excess nitrogen can be unsuitable for plants and may contribute to runoff. Keep fertilizer out of reach of children and pets, and store it according to the package instructions.
Frequently Asked Questions
What does water-soluble nitrogen fertilizer mean?
It is a nitrogen fertilizer designed to dissolve in water for liquid application. Solubility and use directions vary by product, so check the label before mixing or spraying.
Which option is best for lawns?
Simple Lawn Solutions is the clearest lawn-specific choice in this selection. Its listing gives a 28-0-0 analysis, an attached sprayer, and stated coverage of up to 3,200 square feet.
Can urea fertilizer be mixed with water?
The Cz Garden and Plantco products are described as water-soluble urea. Use the package directions for the correct dilution and application method rather than guessing a mixing rate.
Is a higher nitrogen number always better?
No. The appropriate nitrogen amount depends on the plant, growing conditions, and application rate. Compare the label analysis and follow directions to avoid overapplication.
Can nitrogen fertilizer replace a complete fertilizer?
Not necessarily. Products labeled 46-0-0 or 28-0-0 list nitrogen but no phosphorus or potassium. Use a complete nutrient program when plants require nutrients beyond nitrogen.