• Wear gloves when handling to prevent skin drying
• Wear safety glasses or eye protection — urea dust can irritate eyes
• Use a dust mask when spreading in dry or windy conditions
• Wash hands thoroughly after handling

• Store in a cool, dry place in a sealed container — urea is hygroscopic and will clump if exposed to moisture
• Keep bags off concrete floors (concrete releases moisture)
• Keep away from direct sunlight and heat sources
• Keep out of reach of children and pets

• Soil application only — Do not use as foliar spray. Biuret (<1%) causes leaf burn when applied to foliage. For foliar nitrogen, use a specialty low-biuret urea (<0.25%)
• Incorporate within 24-48 hours — Water in with 0.5" irrigation or till into soil to prevent ammonia volatilization
• Optimal soil temperature: 50-85°F — Below 50°F conversion is slow; above 85°F volatilization increases
• Keep 2" away from seeds and transplants — High salt index can burn tender roots
• Never apply to drought-stressed plants — Concentrated nitrogen salts can dehydrate stressed vegetation
• Avoid frozen or saturated soil — Nitrogen sits idle and is prone to runoff

• Eye contact: Flush with clean water for 15 minutes. Seek medical attention if irritation persists
• Skin contact: Wash affected area with soap and water
• Ingestion: Do not induce vomiting. Contact Poison Control (1-800-222-1222) or seek medical attention
• Inhalation: Move to fresh air. Seek medical attention if symptoms persist

Refer to the Safety Data Sheet (SDS) for complete safety information.

Urea (46-0-0) is the most concentrated solid nitrogen fertilizer, containing 46% nitrogen. When applied to soil, the enzyme urease converts it to ammonium and then bacteria convert it to nitrate — both forms plants can absorb. This conversion takes 2-4 days under optimal conditions (50-85°F soil temperature with adequate moisture). For a deeper understanding of how nitrogen fuels plant growth, see our article on What's the Function of Nitrogen (N) in Plants?

Volatilization is the biggest risk with surface-applied urea. To minimize nitrogen loss, water in or till within 24-48 hours, apply before expected rain (0.5" moves urea into soil), avoid hot and windy days when volatilization accelerates above 85°F, consider urease inhibitors that reduce losses by 40-50%, and split large applications into multiple smaller doses for better efficiency.

Timing depends on your crop. Cool-season grasses: early spring (soil 55°F+) and fall. Warm-season grasses: late spring through summer. Vegetables: at planting and during rapid growth. Trees: early spring before bud break. The key factor is soil temperature — below 50°F conversion is very slow, and above 85°F volatilization accelerates. The sweet spot is 50-85°F.

Yes, if misapplied. Urea has a high salt index. To prevent burn, never exceed recommended rates, keep granules 2" away from seeds and transplants, water immediately after application, never apply to drought-stressed plants, and split large applications into 2-3 smaller doses.

No — this product is not recommended for foliar application. Agricultural-grade urea contains biuret (<1%), a manufacturing byproduct that causes leaf burn and phytotoxicity when sprayed on foliage, especially on sensitive crops like citrus, pineapple, and ornamentals. For foliar nitrogen, use a specialty low-biuret urea with less than 0.25% biuret, specifically labeled for foliar use.

Yes. Urea is acid-forming. While the initial conversion temporarily raises pH, the subsequent nitrification process lowers it over time with repeated applications. We recommend testing soil every 2-3 years and balancing with agricultural lime or Dolomite Lime to maintain pH 6.0-7.0 for most crops.

No. Synthetic urea is not approved for organic production. Organic nitrogen alternatives include Blood Meal 13-0-0, Feather Meal 12-0-0, fish emulsion (5-1-1), composted manure, and Alfalfa Meal 2.5-0-2.5.

Urea is hygroscopic — it actively pulls moisture from the air, causing granules to fuse together. To break apart clumped urea, place the bag inside a heavy-duty bag and drop it on a hard surface, or use a rubber mallet. Clumping does not change the nutrient value — only the ease of spreading. To prevent clumping, store in a cool, dry location in sealed containers and keep bags off concrete floors.

Some mixtures work, others cause problems. Safe to mix: Potassium Sulfate (0-0-53), MKP (0-52-34), and Potassium Chloride. Avoid mixing with: Superphosphate (releases moisture, turns soupy), Ammonium Nitrate (extreme clumping), and Calcium Nitrate (forms precipitate). Never mix urea with superphosphate — the chemical reaction creates an unusable mess in your spreader.

Urea 46-0-0 is one of the most effective choices for rapid lawn greening due to its high nitrogen content. For a complete guide to choosing the right lawn fertilizer based on your grass type, climate, and goals, see our article on A Guide to Greener Grass: Selecting the Proper Fertilizer for Your Lawn.

• Manufactured in California, USA
• Tested by independent third-party laboratories for purity and nutrient content
• Registered with the California Department of Food and Agriculture (CDFA)
• Independently lab tested for heavy metal content
• Low biuret content (<1%) verified through quality control testing

If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund. No questions asked.

• Recyclable packaging materials
• Precise nutrient formulation to reduce environmental runoff
• Support for integrated pest management (IPM) practices
• Educating growers on proper incorporation to minimize nitrogen volatilization

1% of all profits go to our foundation, focused on improving educational opportunities for children in agricultural communities.