Nitroform Fertilizer 39-0-0
- Regular Price
- $ 21.99
- Sale Price
- $ 21.99
- Regular Price
- $ 21.99
- Unit Price
- per
Nitroform 39-0-0 Slow Release Nitrogen Fertilizer
Premium slow-release nitrogen fertilizer combining urea and formaldehyde for controlled, season-long feeding. This 100% non-burning formula delivers 39% nitrogen through microbial release, keeping trees, vegetables, lawns, and ornamentals vibrant for 8–12 weeks per application.
Ideal Applications
FEATURES
🌿 39% Slow-Release Nitrogen
One of the highest nitrogen concentrations available in a slow-release form, delivering sustained nutrition over 8–12 weeks per application.
🛡️ 100% Non-Burning Formula
Safe for all plants including newly planted seedlings, sensitive ornamentals, and container plants — even at higher application rates and during hot weather.
🦠 Microbial-Activated Release
Nitrogen is released by soil microorganisms, matching nutrient availability to plant uptake rates for efficient feeding with minimal waste.
🔬 Urea-Formaldehyde Technology
Polymer-coated urea combined with formaldehyde creates a controlled-release matrix that resists leaching and reduces environmental runoff.
📅 Season-Long Feeding
Each application lasts 8–12 weeks, reducing the number of applications needed compared to quick-release nitrogen fertilizers.
🌱 Promotes Vigorous Growth
Consistent nitrogen supply supports robust vegetative growth, vibrant green foliage, and stronger root development throughout the growing season.
🧩 Uniform Mini-Size Particles
Dust-free, uniformly sized granules blend easily with other fertilizers and spread evenly through broadcast or hand application.
🌍 Versatile Application Range
Effective for lawns, vegetable gardens, fruit trees, ornamental beds, container plants, and commercial field crops across all soil types.
💧 Reduced Leaching & Runoff
Controlled-release technology keeps nitrogen in the root zone longer, reducing groundwater contamination and improving nutrient use efficiency.
🧪 Tested for Heavy Metals
Independently lab tested for heavy metal content. CDFA registered and manufactured in California under strict quality standards.
DERIVED FROM
Nitroform 39-0-0 is manufactured through a controlled condensation process that combines urea and formaldehyde to produce a stable, slow-release nitrogen polymer.
Nitrogen Source
SCIENCE BEHIND THE FORMULA
39-0-0: Pure Slow-Release Nitrogen
Nitroform delivers 39% nitrogen in a controlled-release form — one of the highest slow-release nitrogen concentrations on the market. The urea-formaldehyde polymer breaks down gradually through soil microbial activity, providing steady nutrition without salt buildup or osmotic stress to plant roots.
🌿 Nitrogen — 39% (Slow-Release Growth Engine)
The 39% nitrogen drives vegetative growth, chlorophyll production, and protein synthesis. The slow-release mechanism ensures plants receive consistent nitrogen over 8–12 weeks rather than a single flush that causes surge growth and burn risk.
🌸 Phosphorus — 0%
Nitroform is a pure nitrogen source with no phosphorus. For complete nutrition, pair with MKP 0-52-34 or MAP 12-61-0 to supply phosphorus for root development and flowering.
⭐ Potassium — 0%
No potassium is included. Supplement with MKP 0-52-34 or Potassium Sulfate 0-0-53 for stress resistance and fruit quality.
Why Slow-Release Nitrogen Outperforms Quick-Release
🔄 Steady-State Nutrition
Unlike quick-release urea that dumps nitrogen in 1–2 weeks, Nitroform's polymer structure meters out nitrogen over 8–12 weeks, matching natural plant uptake patterns.
🛡️ Zero Burn Risk
The polymer coating prevents salt concentration spikes in the root zone. Quick-release fertilizers can create osmotic stress that damages roots — Nitroform eliminates this risk entirely.
💧 Environmental Efficiency
Controlled release reduces nitrogen leaching into groundwater and volatilization losses to the atmosphere, keeping more of each application where plants can use it.
What to Expect After Application
Results vary with soil temperature, moisture, and microbial activity. Expect faster release in warm, moist soils and slower release in cool or dry conditions.
APPLICATION RATES & DIRECTIONS
Nitroform 39-0-0 is designed for soil application. Spread evenly and water thoroughly after application to activate the slow-release coating.
Lawn & Turf
| Grass Type | Rate per 1,000 sq ft | Rate per Acre |
|---|---|---|
| Cool-Season Grasses | 3 lbs | 130 lbs |
| Mixed / Average | 4 lbs | 175 lbs |
| Warm-Season Grasses | 5 lbs | 220 lbs |
Vegetables
| Application Method | Rate | Notes |
|---|---|---|
| Per Plant (side dress) | 1–2 tablespoons | Light feeders: 1 tbsp; Heavy feeders: 2 tbsp |
| Per 1,000 sq ft | 4–6 lbs | Broadcast or band application |
| Per Acre | 175–260 lbs | Field vegetable production |
Fruit Trees & Ornamentals
| Tree Size | Rate per Tree | Notes |
|---|---|---|
| Young / Dwarf | ½ cup (0.25 lbs) | Apply around drip line |
| Medium | ¾ cup (0.375 lbs) | Spread evenly under canopy |
| Large / Mature | 1 cup (0.5 lbs) | Broadcast under full canopy |
Garden Beds & Ornamental Areas
| Application Type | Rate per 1,000 sq ft | Rate per Acre |
|---|---|---|
| Garden Beds | 4–6 lbs | 175–260 lbs |
| Ornamentals | 3–4 lbs | 130–175 lbs |
Field & Commercial Crops
| Crop Type | Rate per Acre |
|---|---|
| Turf / Pasture | 130 lbs |
| Row Crops | 175 lbs |
| Vegetables | 220 lbs |
| Heavy Feeders | 260 lbs |
Application Timing
Apply when soil temperature is above 55°F for optimal microbial activity. Reapply every 8–12 weeks during the growing season. Best results in early spring and mid-summer. Water thoroughly after each application.
HOW TO USE
Lawns & Turf
- Measure your lawn area in square feet.
- Calculate the amount needed using the rate table or calculator (3–5 lbs per 1,000 sq ft).
- Load a broadcast or drop spreader and calibrate for even distribution.
- Apply in two passes at right angles for uniform coverage.
- Water thoroughly within 24 hours to activate the slow-release coating.
- Reapply every 8–12 weeks during the active growing season.
Vegetable Gardens
- For new plantings, work 4–6 lbs per 1,000 sq ft into the top 2–3 inches of soil before transplanting.
- For established plants, side dress with 1–2 tablespoons per plant, keeping granules 3–4 inches from stems.
- Water thoroughly after application.
- Reapply every 8–12 weeks; heavy feeders like corn may benefit from a mid-season supplemental application.
Fruit Trees & Ornamentals
- Determine the appropriate rate based on tree size (½ to 1 cup per tree).
- Spread granules evenly around the drip line — avoid piling against the trunk.
- Lightly rake into the top inch of soil if possible.
- Water deeply to move nutrients into the root zone.
- Apply in early spring as buds swell and optionally again after fruit set.
Container & Potted Plants
- Apply 1–2 tablespoons per pot (adjust based on container size).
- Sprinkle evenly on the soil surface or mix into the top inch of potting mix.
- Water thoroughly until drainage appears.
- Reapply every 8–10 weeks during the growing season.
Pro Tip: Blending for Complete Nutrition
Nitroform is a pure nitrogen source (39-0-0), so it pairs perfectly with phosphorus and potassium fertilizers for balanced feeding. Mix 50% Nitroform with 25% MAP 12-61-0 and 25% MKP 0-52-34 for a well-rounded lawn or garden blend that provides slow-release nitrogen plus immediate phosphorus and potassium.
When Nitroform Is the Right Choice
- You want extended feeding (8–12 weeks) with fewer applications
- Plants are sensitive to fertilizer burn — seedlings, ornamentals, shallow-rooted species
- You need to reduce nitrogen runoff and leaching in environmentally sensitive areas
- Blending with quick-release P and K sources for a balanced custom mix
- Commercial turf and landscape maintenance requiring consistent color and growth
When to Consider Other Options
- You need an immediate nitrogen response — consider Urea 46-0-0 or Ammonium Sulfate 21-0-0 for quick green-up
- Your soil also needs sulfur — Ammonium Sulfate 21-0-0 provides both nitrogen and sulfur
- You need a complete NPK fertilizer in one product — see our specialty fertilizer blends
NITROFORM CALCULATOR
SAFETY & HANDLING
Personal Protective Equipment (PPE)
- Wear gloves when handling to prevent skin irritation
- Wear safety glasses or eye protection
- Use a dust mask if applying in windy conditions or enclosed spaces
- Wash hands thoroughly with soap and water after handling
Storage Guidelines
- Store in a cool, dry place in the original sealed container
- Keep out of direct sunlight and away from heat sources
- Product may absorb moisture — reseal bag tightly after each use
- Keep away from children and pets
Application Precautions
- Avoid contact with eyes and prolonged skin contact
- Do not apply to waterlogged soils — wait until drainage improves
- Sweep granules off hard surfaces (sidewalks, driveways) back onto soil
- Do not apply near open water sources, wells, or storm drains
- Water in after application to minimize surface runoff
First Aid
- 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.
COMPLETE YOUR SYSTEM
Nitroform provides pure slow-release nitrogen. Build a complete fertilization program by pairing it with these complementary products for phosphorus, potassium, and quick-release nitrogen when needed.
MAP 12-61-0
High-phosphorus water-soluble fertilizer for root development, flowering, and fruit set. Ideal complement to Nitroform's nitrogen-only profile.
MKP 0-52-34
Delivers both phosphorus and potassium in one water-soluble product. Strengthens stress tolerance, improves fruit quality, and supports overall plant vigor.
Urea 46-0-0
Quick-release nitrogen for rapid green-up. Use alongside Nitroform when plants need an immediate nitrogen boost before the slow-release kicks in.
Ammonium Sulfate 21-0-0
Quick-release nitrogen plus 24% sulfur. Lowers soil pH for acid-loving plants and provides rapid nitrogen response between Nitroform applications.
FREQUENTLY ASKED QUESTIONS
What makes Nitroform 39-0-0 non-burning?
Nitroform's non-burning properties come from its urea-formaldehyde polymer structure. Unlike quick-release fertilizers that dissolve immediately and spike salt concentration in the soil, Nitroform releases nitrogen gradually through microbial decomposition. This keeps the osmotic potential around roots low, preventing the salt stress that causes fertilizer burn. The result is safe application on seedlings, sensitive ornamentals, container plants, and even during hot weather.
How long does Nitroform last in the soil?
Each application provides nitrogen for 8–12 weeks. The release rate depends on soil temperature, moisture, and microbial activity. Warmer, moist soils with active microbial populations release nitrogen faster (8–10 weeks), while cool or dry conditions slow the process (10–12 weeks). Optimal release occurs at soil pH 6.0–7.0. Plan reapplications based on these conditions and visible plant response.
When is the best time to apply Nitroform?
Apply when soil temperatures are above 55°F for optimal microbial activation. For cool-season lawns, early spring (April) and early fall (September) are ideal. Warm-season grasses respond best to late spring (May) and mid-summer (July) applications. For vegetables, apply at planting and side dress 3–4 weeks later. Fruit trees benefit from early spring application as buds swell and an optional post-bloom feeding.
Can I mix Nitroform with other fertilizers?
Yes — Nitroform's uniform, dust-free particles blend well with phosphorus sources (MAP, MKP), potassium sources (potassium sulfate, MKP), micronutrient blends, and organic fertilizers. A popular all-purpose blend is 50% Nitroform, 25% phosphorus source, and 25% potassium source. Mix thoroughly before application and use within 30 days. Store blends in dry conditions.
Does Nitroform work in containers and raised beds?
Absolutely. Nitroform's non-burning formula is especially valuable in containers where salt buildup is a common problem. Apply 1–2 tablespoons per pot depending on size, sprinkle on the soil surface or mix into the top inch of potting mix, and water thoroughly. The slow-release action means container plants receive consistent nutrition without the frequent feeding quick-release fertilizers require.
How does Nitroform compare to quick-release nitrogen fertilizers?
Quick-release fertilizers like urea or ammonium sulfate deliver nitrogen immediately but last only 1–3 weeks, require more frequent applications, and carry a higher burn risk. Nitroform's controlled release provides 8–12 weeks of feeding, reduces application frequency, eliminates burn risk, and minimizes nitrogen loss through leaching and volatilization. The trade-off is a slower initial response — which is why some programs combine both types.
Is Nitroform safe around pets and children?
When applied as directed and watered in, Nitroform poses minimal risk. The granules are designed to stay in the soil and break down gradually. However, as with all fertilizers, keep children and pets off treated areas until the product has been watered in and the surface is dry. Store the product in its sealed container out of reach of children and animals.
GROW WITH CONFIDENCE
Every Nitroform product is backed by Greenway Biotech's commitment to quality, transparency, and customer satisfaction.
Product Quality Guaranteed
- Manufactured in California, USA
- Independently lab tested for heavy metal content by third-party laboratories
- Registered with the California Department of Food and Agriculture (CDFA)
- Uniform particle size ensures consistent application and blending
Hassle-Free Return Policy
Not satisfied? We offer a 90-day money-back guarantee. Return the unused portion in its original packaging for a full refund — no hassle, no questions.
Environmental Responsibility
- Slow-release formula significantly reduces nitrogen runoff and groundwater leaching
- Fewer applications per season means less packaging waste and reduced carbon footprint
- Efficient nitrogen use helps support sustainable farming and lawn care practices
Charitable Contributions
1% of all profits go to our foundation, focused on improving educational opportunities for children.
DOCUMENTS
DISCOVER MORE
Related articles coming soon. Check back for guides on slow-release nitrogen, lawn fertilization programs, and custom fertilizer blending.
HAVE QUESTIONS?
Check out our full FAQ page or contact our experts for personalized advice.