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Old Cobblers Farm™ Wicked Growth 46-0-0 Fertilizer – Urea

Complete guide to urea 46-0-0 fertilizer for lawns, gardens & crops. Application rates, tips & comparison. The highest nitrogen fertilizer from Old Cobblers Farm.

Old Cobblers Farm™ Wicked Growth 46-0-0 Fertilizer – Urea

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OUR STORY

Urea is a synthetic organic compound with the chemical formula CO(NH₂)₂. It was the first organic compound to be synthesized from inorganic materials (by Friedrich Wöhler in 1828), and today it is manufactured industrially by reacting ammonia with carbon dioxide at high temperature and pressure. The resulting white prills or granules dissolve readily in water and are compatible with virtually all application methods.

When applied to soil, urea undergoes a conversion process called hydrolysis. The soil enzyme urease breaks urea down into ammonium (NH₄⁺) and carbon dioxide (CO₂) within 2-4 days. The ammonium is then either absorbed directly by plant roots or further converted to nitrate (NO₃⁻) by soil bacteria through nitrification. This two-step conversion means urea has a slight delay before nutrients become fully available, but it also means less risk of immediate burn compared to ammonium nitrate.

One important consideration with urea is volatilization loss. If urea is applied to the soil surface and not watered in within 48 hours, the ammonia produced during hydrolysis can escape as gas, reducing efficiency by 10-30%. This is why incorporation into the soil or immediate irrigation after application is critical for getting full value from urea fertilizer.

NPK

46-0-0

Type

Non-Organic

Derived From

Urea CO(NH₂)₂ — a synthetic organic compound containing 46% nitrogen

Best For

Brand

Wicked Growth

NPK Breakdown

N

Provides the highest nitrogen concentration available in a dry fertilizer at 46%, fueling rapid vegetative growth, deep green foliage color, and increased crop yields through enhanced photosynthesis and protein synthesis

P

N/A — Contains no phosphorus. Supplement with 0-46-0 Triple Phosphate if phosphorus is needed

K

N/A — Contains no potassium. Supplement with 0-0-60 Potash if potassium is needed

What Is It ?

Urea (46-0-0) is the most concentrated dry nitrogen fertilizer available, containing 46% nitrogen by weight—more than double the nitrogen content of ammonium sulfate (21-0-0) and significantly more than ammonium nitrate (34-0-0). This makes urea the most cost-effective and efficient way to deliver nitrogen to plants, crops, and lawns. Nitrogen is the engine of plant growth: it is the primary component of chlorophyll (which drives photosynthesis), amino acids (the building blocks of protein), and nucleic acids (essential for cell division). When plants lack nitrogen, they show yellowing leaves, stunted growth, and dramatically reduced yields. Urea is a white, odorless, highly water-soluble granular fertilizer that can be broadcast with a spreader, dissolved in water for foliar feeding or fertigation, and incorporated into the soil for maximum efficiency. Because urea contains the highest nitrogen content per pound of any dry fertilizer, it is the most widely used nitrogen fertilizer in the world for both agricultural and horticultural applications. Old Cobblers Farm™ Wicked Growth 46-0-0 Urea delivers premium-grade nitrogen for lawns, vegetable gardens, field crops, trees, shrubs, and container plants.

When To Apply ?

The most critical rule with urea is to water it in promptly. Urea left on the soil surface for more than 48 hours loses 10-30% of its nitrogen to ammonia volatilization—literally evaporating into the air. Apply just before rain or irrigate immediately after spreading. For lawn applications, use a calibrated broadcast or drop spreader set to deliver 1-2 lbs per 1,000 sq ft. Walk in overlapping passes and avoid doubling up on turns. For vegetable gardens, side-dress by sprinkling 2-4 tablespoons per 10 feet of row, 4-6 inches from plant stems, then cover with soil and water. For container plants, dissolve 0.5 teaspoon in a gallon of water and use as a liquid feed every 4-6 weeks. For foliar application, dissolve 1 tablespoon per gallon of water and spray during cool morning hours to avoid leaf burn. For field crops, apply 40-80 lbs per acre and incorporate with tillage or irrigation. Split applications (applying half at planting and half mid-season) are more efficient than a single heavy dose because they reduce losses and match nitrogen availability to peak plant demand.

How to Apply ?

1. Soil Test

Test your soil to confirm nitrogen need and determine the appropriate application rate.

2. Calculate Rate

Calculate the amount of urea needed for your area based on crop nitrogen requirements.

3. Lawn Rate

For lawns, calibrate your spreader and apply 1–2 lbs per 1,000 sq ft evenly. Avoid overlapping passes.

4. Garden Rate

For gardens, broadcast 0.25–0.5 lbs per 100 sq ft and work into the top 2–3 inches of soil.

5. Tree Rate

For trees, apply 0.25–0.5 cups per inch of trunk diameter in a ring around the drip line.

6. Water In

Water thoroughly within 48 hours to prevent nitrogen loss from volatilization. Urea converts to ammonia gas if left on the surface.

7 Lawn Rate

For lawns, calibrate your spreader and apply 1–2 lbs per 1,000 sq ft evenly. Avoid overlapping passes.

How To Store

Store in a cool, dry location away from moisture and heat. Urea is hygroscopic and will absorb moisture and cake if stored improperly—keep bags sealed. Never mix urea with ammonium sulfate in storage as they form a cement-like substance when exposed to moisture. Wear gloves during handling and wash hands afterward. Keep away from eyes. Non-toxic and non-flammable, but keep out of reach of children and pets. Do not apply near water sources to prevent nitrogen runoff into waterways.

FAQs

1. What is 5-10-10 fertilizer used for?

5-10-10 fertilizer is a low-nitrogen, high-phosphorus and high-potassium blend used for plants that need strong root development, flowering, and fruiting without excessive leafy growth. It is especially popular for root crops like potatoes and carrots, flowering plants, bulbs, fruit trees, and established perennial gardens. The reduced nitrogen prevents leggy, soft growth while the elevated phosphorus and potassium promote deep roots, vibrant blooms, and high-quality fruit. Old Cobblers Farm™ Wicked Growth 5-10-10 Multi-Use Fertilizer is an all-purpose solution for lawns, flower beds, vegetable gardens, and more.

2. What is 5-10-10 fertilizer?

5-10-10 fertilizer is a granular plant food with an NPK ratio of 5% nitrogen, 10% phosphorus, and 10% potassium. It is classified as a low-nitrogen fertilizer, which makes it ideal for applications where you want to encourage root growth, flowering, and fruiting rather than leafy vegetative growth. The higher phosphorus and potassium levels support strong roots, stress tolerance, and reproductive development in plants. It is one of the most versatile fertilizer formulas available for home gardens and farms. Old Cobblers Farm™ Wicked Growth 5-10-10 Fertilizer delivers premium ingredients for reliable, balanced results.

3. Is 5-10-10 a good fertilizer for tomatoes?

Yes, 5-10-10 is a solid choice for tomatoes, particularly during the flowering and fruiting stages. The low nitrogen prevents excessive vine growth while the higher phosphorus supports blossom development and root strength. The elevated potassium improves fruit quality, size, flavor, and disease resistance. Many experienced tomato growers prefer 5-10-10 over balanced fertilizers because it encourages the plant to put energy into fruit production rather than foliage. Apply at planting and side-dress every 4–6 weeks during the growing season. Old Cobblers Farm™ Wicked Growth 5-10-10 Multi-Use Fertilizer promotes strong roots, healthy blooms, and heavy tomato harvests.

4. Where can I buy 5-10-10 fertilizer?

5-10-10 fertilizer can be purchased online from specialty retailers like Old Cobblers Farm at oldcobblersfarm.com, as well as through major marketplaces including Amazon, eBay, and Walmart. While big-box stores like Home Depot and Lowe's may carry some 5-10-10 options, specialty farm and garden suppliers typically offer higher-quality formulations at better value. Old Cobblers Farm™ Wicked Growth 5-10-10 Multi-Use Fertilizer is available in multiple bag sizes and ships nationwide, making it easy to get premium fertilizer delivered right to your door.

5. What is a low nitrogen fertilizer?

A low nitrogen fertilizer is any fertilizer where the first NPK number (nitrogen) is significantly lower than the other two numbers. 5-10-10 is a classic example — with only 5% nitrogen compared to 10% each of phosphorus and potassium. Low nitrogen fertilizers are used when you want to promote root development, flowering, and fruiting without stimulating excessive leaf and stem growth. They are ideal for root crops, bulbs, flowering annuals and perennials, established trees, and fall applications. Old Cobblers Farm™ Wicked Growth 5-10-10 Fertilizer is one of the most trusted low-nitrogen options for home gardens and farms.

6. Can I use 5-10-10 fertilizer on my lawn?

While 5-10-10 can be used on lawns, it is not the ideal primary lawn fertilizer because lawns typically benefit from higher nitrogen for green growth and density. However, 5-10-10 is excellent as a starter fertilizer for newly seeded lawns or sod because the higher phosphorus promotes rapid root establishment. It also works well as a fall fertilizer to build root strength and winter hardiness without encouraging tender new leaf growth that could be damaged by frost. Old Cobblers Farm™ Wicked Growth 5-10-10 Multi-Use Fertilizer is a versatile option for lawns, gardens, flowers, and crops.

7 Is there an organic 5-10-10 fertilizer?

Yes, Old Cobblers Farm offers organic alternatives with similar nutrient profiles. While exact organic 5-10-10 formulations are less common due to the nature of organic inputs, several Wicked Organics products deliver comparable nutrition using all-natural ingredients. The Wicked Organics 4-6-4 and 2-3-3 formulas provide similar low-nitrogen, higher-phosphorus and potassium ratios from organic sources like bone char, sulfate of potash, vegetable protein meals, and animal protein meals. These OMRI-Listed options are ideal for organic gardens that need the benefits of a 5-10-10-style fertilizer. Visit oldcobblersfarm.com to explore the full Wicked Organics lineup.