Old Cobblers Farm™ Wicked Growth 8-16-16 Fertilizer – Multi Purpose
Product Overview
Description
Wicked Growth 8-16-16 Multi-Purpose Fertilizer emphasizes phosphorus and potassium for crops that prioritize root development, tuber formation, and storage quality over leafy growth. This specialized ratio is the professional choice for potato production and root vegetable cultivation.
The 8-16-16 ratio provides double the phosphorus and potassium relative to nitrogen, encouraging plants to invest energy in roots, tubers, and bulbs rather than excessive foliage. Results in larger, more uniform potatoes, bigger onion bulbs, and improved storage quality.
Essential for potato growers from Maine to Idaho who understand that tuber quality depends on adequate P-K nutrition throughout the growing season.
Highlights
• High P-K for root development
• Potato specialist formula
• Improves tuber size & quality
• Low N prevents excessive foliage
• Enhanced storage quality
The Science Behind It
How It Works
This root-and-fruit focused formula provides moderate nitrogen with doubled phosphorus and potassium concentrations. The 1-2-2 ratio prioritizes below-ground development and crop quality over leaf production. When applied, the elevated P-K levels support extensive root systems, strong flower and fruit development, and improved storage quality. Lower nitrogen prevents excessive vegetative growth that can delay maturity or reduce fruit quality.
The Science
The 8-16-16 ratio reflects nutrient demands of fruiting crops and root vegetables during development and maturation phases. Phosphorus drives ATP production needed for sugar transport from leaves to storage organs and fruits. Potassium activates enzymes involved in starch synthesis and sugar accumulation, directly impacting flavor and storage life. Moderate nitrogen maintains photosynthetic capacity without stimulating excessive leaf growth that competes with fruit for resources.
Nutrients Available
8% Total Nitrogen – Maintains healthy foliage without excessive vegetative growth. 16% Available Phosphate (P₂O₅) – Maximizes root development, flowering, and fruit set. 16% Soluble Potash (K₂O) – Enhances fruit quality, sugar content, and storage characteristics. Ideal for potatoes, root crops, tomatoes, and fruiting vegetables.
How to Apply
1-2 lbs/100 sq ft every 4-6 weeks. Severe deficiency: 2-3 lbs initially.
1
Action:
Survey garden bed and note deficiency symptoms. Map high-need zones.
Pro Tip:
Sandy areas and fruiting sections need more K than shaded areas.
Avoid:
Don't leave granules on surface in hot weather - damages plants.
2
Action:
Calculate 1-2 lbs per 100 sq ft. For 10x20 garden (200 sq ft), use 2-4 lbs.
Pro Tip:
Weigh fertilizer on kitchen scale. One cup 0-0-60 weighs ~0.5 lb.
Avoid:
Don't exceed 2 lbs per 100 sq ft per application. Split heavy doses.
3
Action
Broadcast granules evenly across soil surface. Work into top 2-3 inches with cultivator.
Pro Tip:
Sandy areas and fruiting sections need more K than shaded areas.
Avoid:
Don't spread on windy days - granules drift causing uneven application.
4
Action
Water thoroughly with 1-2 inches to dissolve granules and move K into root zone.
Pro Tip:
Incorporation prevents salt buildup and gets K to roots faster.
Avoid:
Don't leave granules on surface in hot weather - damages plants.
Key Benefits
Potato Production Excellence – The 1:2:2 ratio matches potato nutrient requirements for maximum tuber size, specific gravity, and storage life.
Superior Root Crop Quality – High phosphorus and potassium promote uniform root development, deeper color, and improved sweetness.
Reduced Disease Pressure – Lower nitrogen produces tougher plant tissues less susceptible to late blight, soft rot, and other diseases.
Extended Storage Potential – Potassium strengthens cell walls and reduces moisture content, dramatically improving storage life through winter.
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