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Wicked Growth 10-10-10 Fertilizer Guide

Updated: Jul 20

Old Cobblers Farm™ 10-10-10 Fertilizer - Multi Purpose
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Recommended Application Rates for 10-10-10 Fertilizer

The 10-10-10 fertilizer, a balanced all-purpose fertilizer (10% nitrogen, 10% phosphorus, 10% potassium), supports leafy growth, root development, flowering, and overall plant health for vegetables, flowers, lawns, and shrubs. Below are recommended application rates to optimize growth and prevent over-fertilization.

Per Square Foot

  • General Garden Use: Apply 2–4 tablespoons per square foot (equivalent to 1–2 pounds per 100 square feet).

  • Lawns: Use 1–2 tablespoons per square foot (equivalent to 0.5–1 pound per 100 square feet).


Applying 10-10-10 to Lawn

  • Method: Spread evenly using a broadcast spreader, incorporate into the top 2–3 inches of soil, and water thoroughly.

Per Plant

  • Vegetables/Flowers: Apply 1 tablespoon around the base, 2–3 inches from the stem to avoid burn.

  • Shrubs/Small Trees: Use 2–4 tablespoons (equivalent to 1/4–1/2 cup) around the drip line.

  • Method: Distribute in a circle, lightly work into soil, and water well.

Per Gallon of Water

  • Liquid Application: Dissolve 1 tablespoon per gallon of water for container plants or quick nutrient boosts.

  • Method: Apply to soil, avoiding foliage to prevent burn. Use every 4–6 weeks during the growing season.

Application Tips

  • Soil Testing: Test soil to confirm nutrient needs and adjust rates.

  • Timing: Apply in early spring or mid-summer; avoid late-season applications to prevent frost-sensitive growth.

  • Watering: Water after application to activate nutrients and reduce burn risk.

  • Safety: Wear gloves and follow label instructions to avoid irritation.

Application Frequency of 10-10-10 Fertilizer

Apply 10-10-10 fertilizer every 4–6 weeks during the growing season, tailored to plant needs:

  • Vegetable Gardens: Apply at planting and mid-season for continuous growth.

  • Flower Beds: Apply at the start of the season and every 4–6 weeks for annuals; once or twice for perennials.



  • Lawns: Apply in early spring and early fall.

  • Trees/Shrubs: Apply in early spring; a second application may be needed for heavy feeders.

Tips: Adjust frequency based on soil tests and plant response to avoid over-fertilization.

Application Rate Differences for Established Plants and Seedlings

Yes, rates differ due to sensitivity and nutrient needs:

  • Seedlings: Use 1/4–1/2 tablespoon per plant or a half-strength liquid solution (0.5 tablespoon per gallon of water) to prevent burn.

  • Established Plants: Apply full rates (1–4 tablespoons per plant or 1–4 tablespoons per square foot) to support robust growth.

Note: Soil test to tailor rates and avoid over-fertilization.

Best Time of Year or Season to Apply 10-10-10 Fertilizer

Optimal times include:

  • Early Spring: Before planting or as plants emerge to support root and shoot growth for vegetables, flowers, and lawns.

  • Early Summer: During flowering/fruiting to enhance blooms and fruit quality.

  • Early Fall: For lawns or perennials to strengthen roots before winter.

Note: Avoid late fall applications to prevent frost damage. Soil test to confirm nutrient needs.

Application Timing Relative to Planting Stages

  • Before Planting: Incorporate 2–4 tablespoons per square foot into soil 2–3 weeks before planting.

  • At Planting: Apply 1/4–1/2 tablespoon per seedling or 1 tablespoon per transplant, avoiding direct root contact.

  • During Active Growth: Use 1–4 tablespoons per plant every 4–6 weeks for flowering/fruiting support.

Note: Adjust based on soil tests and plant requirements.

Timing Around Flowering, Fruiting, or Dormancy Stages

  • Flowering Stage: Apply at bud formation to leverage phosphorus (10%) for strong blooms.

  • Fruiting Stage: Apply early in fruiting to enhance fruit quality with potassium (10%).

  • Dormancy Stage: Avoid application, as nutrient uptake is minimal, risking leaching.

Note: Time applications to maximize benefits during reproductive stages.

Timing Around Rain or Irrigation

  • Before Light Rain/Irrigation: Apply before moderate rain or irrigation to dissolve nutrients into soil.

  • Avoid Heavy Rain: Prevent runoff by avoiding application before heavy rain.

  • After Irrigation: Apply to moist soil, followed by light watering if needed.

Note: Monitor weather to optimize nutrient uptake and minimize environmental impact.

Application Methods for 10-10-10 Fertilizer

  • Topdressing: Spread 1–4 tablespoons per square foot for established plants/lawns; water in.

  • Side-Dressing: Apply 1–2 tablespoons along rows or around plants during growth.

  • Soil Incorporation: Mix 2–4 tablespoons per square foot into soil before planting.

  • Foliar Spray: Not ideal for granular forms; use liquid solutions if specified by the manufacturer.

Note: Choose method based on plant needs and follow label instructions.

Watering After Application

Yes, water in 10-10-10 fertilizer to:

  • Dissolve granules for nutrient uptake.

  • Prevent leaf burn by washing granules off foliage.

  • Ensure even nutrient distribution.

  • Reduce runoff risk.

Note: Follow label watering guidelines.

Mixing 10-10-10 Fertilizer with Other Products

Yes, it can be mixed with compatible fertilizers/amendments:

  • Soil Test: Assess nutrient needs to avoid excess.

  • Compatibility: Check for chemical reactions with other products.

  • Complementary Products: Pair with specialized fertilizers if specific deficiencies exist.

  • Organic Amendments: Combine with compost or manure for soil health.

  • Mixing: Blend thoroughly for uniform application.

  • Safety: Wear gloves and follow label warnings.

Note: Test mixtures and monitor plant response.

Suitability for Drip Irrigation or Fertigation Systems

Yes, if water-soluble:

  • Solubility: Ensure complete dissolution to avoid clogging emitters.

  • Dilution: Use 1 tablespoon per gallon of water.

  • Maintenance: Clean system filters regularly.

  • Timing: Apply during growth stages per plant needs.

Note: Verify product solubility and system compatibility.

Slow-Release or Frequent Application

The 10-10-10 fertilizer is typically quick-release unless labeled as slow-release. Quick-release requires applications every 4–6 weeks during the growing season. Check the label for slow-release formulations, which may need only 1–2 applications per season.

Suitability for Different Plants

The 10-10-10 fertilizer suits a wide range of plants:

  • Nitrogen (10%): Supports leafy growth for vegetables and lawns.

  • Phosphorus (10%): Promotes root development and flowering.

  • Potassium (10%): Enhances fruit quality and plant health.

Not Ideal For:

  • Plants needing specific nutrient ratios (e.g., high-phosphorus for root crops).

  • Low-nutrient plants (e.g., cacti).

Note: Soil test to match fertilizer to plant needs.

Fertilizer Burn Risk and Precautions

Yes, overapplication risks burn due to high nutrient concentration:

  • Follow Rates: Use recommended rates (1–4 tablespoons per square foot/plant).

  • Soil Test: Confirm nutrient needs.

  • Even Application: Use spreaders for uniformity.

  • Watering: Water thoroughly post-application.

  • Avoid Stress: Apply in cool, moist conditions.

  • Monitor Plants: Watch for yellowing or wilting.

Note: Adhere to label rates to prevent damage.

Sensitive Plants to Avoid

Avoid using 10-10-10 on:

  • Orchids: High nutrients may cause root burn.

  • Cacti/Succulents: Excess nitrogen risks overgrowth or rot.

  • Ferns: High nitrogen may burn fronds.

  • Acid-Loving Plants: Azaleas, rhododendrons may suffer from pH changes.

  • Seedlings: Prone to burn; use diluted rates.

  • Native Plants: High nutrients may disrupt growth.

Note: Match fertilizer to plant-specific needs via soil testing.

Interactions with Pesticides, Herbicides, or Other Products

  • Timing: Apply separately (days apart) to ensure efficacy.

  • Compatibility: Test mixtures to avoid chemical reactions or precipitation.

  • Plant Health: Avoid applying to stressed plants.

  • Environmental Care: Prevent runoff with proper timing.

Note: Check labels and consult experts for specific combinations.

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; follow re-entry guidelines.

  • Pollinators: Generally safe; avoid applying to active flowers to protect bees.

  • Organic Alternatives: Consider natural options for added safety.

Note: Water in after application and follow label safety instructions.

Soil pH and Effectiveness

Soil pH impacts nutrient availability:

  • Acidic Soils (pH < 6.0): Phosphorus binds with iron/aluminum, reducing uptake.

  • Neutral Soils (pH 6.0–7.0): Optimal for nutrient availability.

  • Alkaline Soils (pH > 7.5): Micronutrient availability may decrease.

  • Soil Testing: Test pH and adjust with lime (to raise) or sulfur (to lower).

Note: Soil testing ensures effective nutrient use.

Leaching and Runoff Risks

  • Nitrogen (10%): Highly leachable, especially as nitrate in sandy soils.

  • Phosphorus (10%): Low leaching but high runoff risk in saturated soils.

  • Potassium (10%): Moderately mobile; leaches in low-CEC soils.

Minimizing Risks:

  • Apply per soil test recommendations.

  • Incorporate into soil to reduce runoff.

  • Avoid application before heavy rain.

  • Use slow-release formulations if available.

Note: Proper management minimizes environmental impact.

Organic Certification Status

The 10-10-10 fertilizer is typically synthetic and not OMRI-listed or certified organic due to its chemical composition. Organic alternatives (e.g., compost, bone meal) may have similar NPK ratios and be certified. Check the label or OMRI database for confirmation.

Key Nutrients Supplied

  • Macronutrients:

    • Nitrogen (10%): Supports leaf growth and photosynthesis.

    • Phosphorus (10%): Promotes root development and flowering.

    • Potassium (10%): Enhances fruit quality, disease resistance, and plant health.

  • Micronutrients (if included): May contain trace amounts of calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, molybdenum (check label).

Note: Supplement based on soil test results.

Formulation Purpose

The 10-10-10 fertilizer is formulated for general plant health, supporting leafy growth (nitrogen), root development and flowering (phosphorus), and fruit quality and stress resistance (potassium). It’s ideal for vegetables, flowers, and lawns but may be excessive for low-nutrient plants.

Bio-stimulants, Mycorrhizae, or Beneficial Microbes

The 10-10-10 fertilizer typically includes only macronutrients unless specified. Check the label for:

  • Bio-stimulants: Enhance nutrient uptake and stress tolerance (e.g., seaweed extracts).

  • Mycorrhizae: Improve nutrient/water absorption, especially phosphorus.

  • Beneficial Microbes: Enhance soil health and pathogen resistance.

Note: Use organic amendments for these benefits if not included.

Storage Guidelines

  • Cool, Dry Location: Prevent moisture absorption and caking.

  • Sealed Containers: Use original packaging or airtight containers.

  • Away from Sunlight: Avoid heat degradation.

  • Off the Ground: Use pallets to prevent moisture contact.

  • Separate from Chemicals: Avoid reactions with other substances.

  • Child/Pet Safety: Store securely.

Note: Proper storage maintains efficacy.

Shelf Life and Expiration Concerns

The 10-10-10 fertilizer lasts indefinitely if stored properly:

  • Conditions: Keep dry, sealed, and away from extreme temperatures.

  • Inspection: Check for clumping or discoloration before use.

Note: Follow manufacturer storage guidelines.

Special Handling Requirements

  • Humidity Sensitivity: Store dry to prevent caking, as it’s hygroscopic.

  • Corrosiveness: Mildly corrosive to metal; use plastic tools and clean metal equipment.

  • 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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