Wicked Growth 0-12-0 Fertilizer Guide
- Old Cobblers Farm
- Jul 18
- 6 min read
Recommended Application Rates for 0-12-0 Fertilizer
The 0-12-0 fertilizer, often triple superphosphate or bone meal, is high in phosphorus (12%), promoting root development, flowering, and fruiting in phosphorus-deficient soils. It’s ideal for vegetables, flowers, and trees where nitrogen and potassium are sufficient.
Per Square Foot
General Use (e.g., Gardens, Beds): Apply 1–1.5 teaspoons per square foot (equivalent to 0.5–0.75 pounds per 100 square feet).
Method: Spread evenly, incorporate into the top 2–3 inches of soil, and water thoroughly.
Per Plant
Small Plants (e.g., Annuals, Vegetables): Use 1 teaspoon around the base, 2–3 inches from the stem.
Medium Plants (e.g., Small Shrubs, Tomatoes): Apply 1–2 tablespoons per plant.
Large Plants (e.g., Trees, Large Shrubs): Use 1/4–1/2 cup around the drip line, based on size.
Method: Distribute evenly, lightly work into soil, and water well.
Per Gallon of Water
Liquid Application: Dissolve 1 tablespoon per gallon of water for soil drenching.
Method: Apply to soil, ensuring full dissolution. Use sparingly, every 4–6 weeks.
Application Tips
Soil Testing: Test soil to confirm phosphorus deficiency.
Timing: Apply at planting or early spring for best results.
Safety: Wear gloves/mask; follow label instructions.
Application Frequency of 0-12-0 Fertilizer
Apply 0-12-0 fertilizer once or twice per growing season, based on soil tests and plant needs:
Initial Application: At planting or early spring to support root growth.
Mid-Season (if needed): For phosphorus-intensive crops (e.g., tomatoes, peppers) at bud set.
Avoid Overuse: Excess phosphorus can cause nutrient imbalances or runoff.
Note: Adjust frequency based on soil test results.
Application Rate Differences for Established Plants and Seedlings
Yes, rates differ due to sensitivity:
Seedlings: Use 1/4–1/2 teaspoon per plant or a diluted solution (0.5 tablespoon per gallon of water) to avoid burn.
Established Plants: Apply full rates (1 teaspoon–1/2 cup per plant or 1–1.5 teaspoons per square foot) to support flowering/fruiting.
Note: Soil test to tailor rates and prevent over-fertilization.
Best Time of Year or Season to Apply 0-12-0 Fertilizer
Early Spring: Before planting to support root development for vegetables, flowers, or perennials.
Fall: For perennials or bulbs to strengthen roots before winter.
Flowering/Fruiting Stages: Apply at bud set for phosphorus-demanding crops.
Note: Avoid overuse; confirm need with soil tests.
Application Timing Relative to Planting Stages
Before Planting: Incorporate 1–1.5 teaspoons per square foot into soil 2–3 weeks prior.
At Planting: Apply 1/4–1/2 teaspoon per seedling or 1–2 tablespoons per transplant, avoiding direct root contact.
During Active Growth: Use sparingly at bud set if deficiency persists.
Note: Phosphorus is immobile; incorporate into root zone for best results.
Timing Around Flowering, Fruiting, or Dormancy Stages
Flowering Stage: Apply at bud formation to enhance bloom quality with phosphorus (12%).
Fruiting Stage: Use early in fruiting to support fruit development.
Dormancy Stage: Apply before dormancy for perennials; avoid during full dormancy to prevent runoff.
Note: Time applications for flowering/fruiting stages.
Timing Around Rain or Irrigation
Before Light Rain/Irrigation: Apply before moderate rain or irrigation to aid nutrient absorption.
Avoid Heavy Rain: Prevent runoff by avoiding application before heavy rain.
Moist Soil: Apply to moist soil, followed by light watering if needed.
Note: Check weather to optimize uptake and reduce runoff.
Application Methods for 0-12-0 Fertilizer
Soil Incorporation: Mix 1–1.5 teaspoons per square foot into soil before planting (most effective).
Side-Dressing: Apply 1–2 teaspoons along rows or around plants during growth.
Topdressing: Use 1–1.5 teaspoons per square foot; water in to move nutrients to roots.
Foliar Spray: Not recommended; phosphorus is poorly absorbed through leaves.
Note: Incorporate or side-dress for best phosphorus uptake.
Watering After Application
Yes, water in 0-12-0 fertilizer to:
Dissolve granules for root uptake.
Prevent burn by washing off foliage.
Ensure even nutrient distribution.
Reduce runoff risk.
Note: Follow label watering instructions.
Mixing 0-12-0 Fertilizer with Other Products
Yes, it can be mixed with compatible fertilizers/amendments:
Soil Test: Confirm phosphorus needs; supplement nitrogen/potassium if deficient.
Compatibility: Avoid mixing with high-calcium products to prevent insoluble compounds.
Mixing: Blend thoroughly for uniform application.
Organic Amendments: Pair with compost/manure for soil health.
Safety: Wear gloves; test mixtures on a small area.
Note: Monitor plant response to avoid imbalances.
Suitability for Drip Irrigation or Fertigation Systems
Yes, if water-soluble (e.g., monoammonium phosphate):
Solubility: Ensure complete dissolution (1 tablespoon per gallon) to avoid clogging.
Filtration: Use filters to prevent emitter blockages.
Maintenance: Flush system regularly.
Timing: Apply during growth stages per plant needs.
Note: Verify product solubility; bone meal is unsuitable for fertigation.
Slow-Release or Frequent Application
The 0-12-0 fertilizer varies by formulation:
Rock Phosphate/Bone Meal: Slow-release, applied once or twice per season.
Triple Superphosphate: Quick-release, may need reapplication every 4–6 weeks if deficiency persists.
Note: Check label for formulation; avoid overuse per soil tests.
Suitability for Different Plants
The 0-12-0 fertilizer suits phosphorus-demanding plants:
Phosphorus (12%): Supports root growth, flowering, and fruiting for vegetables (e.g., carrots, tomatoes) and flowers.
Not Ideal For: Nitrogen/potassium-dependent plants (e.g., leafy greens, lawns) or low-phosphorus natives.
Note: Soil test to match plant needs.
Fertilizer Burn Risk and Precautions
Yes, overapplication risks burn due to high phosphorus (12%):
Follow Rates: Use 1–1.5 teaspoons per square foot or 1 teaspoon–1/2 cup per plant.
Soil Test: Confirm phosphorus needs.
Even Application: Spread uniformly to avoid hotspots.
Watering: Water thoroughly post-application.
Avoid Foliage: Prevent direct contact with leaves/stems.
Note: Adhere to label rates to prevent damage.
Sensitive Plants to Avoid
Avoid using 0-12-0 on:
Low-Phosphorus Natives: Excess phosphorus causes nutrient lockout (e.g., some wildflowers).
Proteaceae Family: Grevilleas, banksias are sensitive to phosphorus toxicity.
Mycorrhizal Plants: High phosphorus reduces fungal symbiosis (e.g., some perennials).
Nitrogen-Loving Plants: Leafy greens need balanced nutrients.
Aquatic Plants: Avoid near water bodies to prevent algal blooms.
Note: Soil test to ensure suitability.
Interactions with Pesticides, Herbicides, or Other Products
Timing: Apply separately (days apart) to maintain efficacy.
Compatibility: Test mixtures to avoid reactions (e.g., with calcium-based products).
Plant Health: Avoid stressed plants.
Runoff Prevention: Time applications to avoid heavy rain.
Note: Check labels for specific guidance.
Safety for Pets, Kids, and Pollinators
Pets/Kids:
Ingestion: Store securely; ingestion may cause gastrointestinal upset.
Contact: Wear gloves; rinse skin/eyes if contacted.
Timing: Apply when pets/kids are absent; water in before re-entry.
Pollinators: Safe if not applied to blooming flowers; avoid runoff to water bodies.
Organic Alternatives: Use bone meal/rock phosphate for added safety.
Note: Follow label safety instructions.
Soil pH and Effectiveness
Soil pH affects phosphorus availability:
Optimal Range (pH 6.0–7.0): Maximizes uptake.
Acidic Soils (pH < 6.0): Phosphorus binds with iron/aluminum, reducing availability.
Alkaline Soils (pH > 7.5): Phosphorus binds with calcium, limiting uptake.
Soil Testing: Test pH and adjust with lime (to raise) or sulfur (to lower).
Note: Soil testing ensures effective use.
Leaching and Runoff Risks
Phosphorus (12%): Low leaching due to soil binding but high runoff risk in heavy rain or saturated soils.
Minimizing Risks:
Apply per soil test recommendations.
Incorporate into soil to reduce runoff.
Avoid application before heavy rain.
Note: Proper management prevents environmental harm.
Organic Certification Status
The 0-12-0 fertilizer varies by formulation:
Bone Meal/Rock Phosphate: Often OMRI-listed or certified organic.
Triple Superphosphate: Typically synthetic, not certified organic.
Check the label or OMRI database for certification status.
Key Nutrients Supplied
Macronutrients:
Phosphorus (12%): Supports root growth, flowering, and fruiting.
Secondary Nutrients/Micronutrients: May include trace calcium (e.g., in bone meal); check label.
Note: Supplement nitrogen/potassium if needed, per soil tests.
Formulation Purpose
The 0-12-0 fertilizer is formulated for root development, flowering, and fruiting due to its high phosphorus content (12%). It’s ideal for phosphorus-deficient soils but not for general plant health due to no nitrogen/potassium.
Bio-stimulants, Mycorrhizae, or Beneficial Microbes
The 0-12-0 fertilizer typically includes only phosphorus (and trace calcium in some formulations). It does not contain:
Bio-stimulants: Enhance nutrient uptake/stress tolerance.
Mycorrhizae: Improve phosphorus/water absorption.
Beneficial Microbes: Promote soil health.
Note: Use organic amendments for these benefits if needed.
Storage Guidelines
Dry Location: Prevent moisture absorption to avoid caking.
Sealed Containers: Use original packaging or airtight containers.
Cool, Ventilated Area: Avoid heat and ensure air circulation.
Off the Ground: Use pallets to prevent dampness.
Child/Pet Safety: Store securely.
Note: Proper storage maintains efficacy.
Shelf Life and Expiration Concerns
The 0-12-0 fertilizer has an indefinite shelf life if stored properly:
Conditions: Keep dry, sealed, and cool.
Inspection: Check for clumping before use.
Note: Follow manufacturer storage guidelines.
Special Handling Requirements
Humidity Sensitivity: Moderately hygroscopic; store dry to prevent caking.
Corrosiveness: Non-corrosive but avoid prolonged metal contact; use plastic tools.
Safety: Wear gloves/mask to avoid irritation or dust inhalation.
Environmental Care: Avoid over-application to prevent runoff.
Note: Follow label instructions for safe handling.
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