Lettuce Fertilizer 8-15-36 | Chelated Micronutrients | Hydroponics, Soil & Foliar Application
- Regular Price
- $ 24.99
- Sale Price
- $ 24.99
- Regular Price
- $ 24.99
- Unit Price
- per
Lettuce Fertilizer 8-15-36
Unlock the full potential of your leafy greens with our scientifically formulated Lettuce Fertilizer 8-15-36. This premium water-soluble blend delivers the perfect balance of nutrients for lettuce, kale, spinach, microgreens, and over a dozen leafy vegetables. Enriched with essential micronutrients and free from heavy metals, our fertilizer ensures vigorous growth, nutrient-dense harvests, and exceptional flavor in every leaf.
โก Quick Dose Guide
Select your reservoir size for instant hydroponic dosing (vegetative stage). Always add Cal-Mag Plus first!
WHY GROWERS CHOOSE THIS FORMULA
โ๏ธ Perfect 8-15-36 Ratio
Engineered specifically for leafy tissues. High Potassium (36%) ensures crispness and shelf-life, while moderate Nitrogen (8%) prevents leggy, weak growth.
๐ก๏ธ 100% Chelated Micros
Iron, Manganese, Zinc, and Copper are protected by EDTA chelation. This prevents nutrient lockout in high pH water, ensuring your plants actually absorb what you feed them.
๐ซ Heavy Metal Free
We test every batch to ensure zero heavy metals. When you're growing food for your family or customers, purity is not optional.
๐ Instant Solubility
Dissolves fully in cold water with no residue. Safe for drip lines, aeroponics (clog-free), and fine mist foliar sprayers.
NPK FORMULA EXPLAINED
8-15-36: The Perfect Balance for Leafy Greens
Our formula is specifically engineered for the unique nutritional demands of lettuce and leafy vegetables.
Where Each Nutrient Works
- Chlorophyll production
- Leaf development
- Green color intensity
- Root establishment
- ATP energy transfer
- Early vigor
- Crunch: Thick cell walls
- Shelf life: Days longer
- Stress: Heat & disease tolerance
N - 8%
Nitrogen
Moderate nitrogen provides healthy leaf development without excessive growth, perfect for tender, flavorful greens.
P - 15%
Phosphorus
Enhanced phosphorus promotes robust root systems and strong energy transfer for vigorous growth.
K - 36%
Potassium
Very high potassium enhances crisp texture, disease resistance, and extends shelf life of harvested greens.
SCIENCE BEHIND THE FORMULA
Understanding why our 8-15-36 formula works so well for leafy greens requires looking at the unique nutritional demands of these crops throughout their growth cycle.
Why Moderate Nitrogen (8%)?
Leafy greens need sufficient nitrogen for chlorophyll production and leaf development, but too much creates problems:
- Overly succulent tissues prone to disease
- Reduced shelf life and poor shipping quality
- Bitter flavors and compromised texture
- Increased nitrate accumulation in leaves
Why Enhanced Phosphorus (15%)?
Phosphorus is critical for leafy greens because it:
- Develops strong, efficient root systems for nutrient uptake
- Enables rapid ATP production for cellular energy
- Supports photosynthesis and sugar transport
- Promotes early establishment and faster maturity
Why Very High Potassium (36%)?
Leafy greens are heavy potassium feeders. This essential nutrient:
- Regulates stomatal function and water use efficiency
- Activates over 60 enzyme systems
- Strengthens cell walls for crisp texture
- Enhances disease resistance, especially to fungal infections
- Improves cold tolerance and stress resistance
- Extends post-harvest shelf life significantly
๐ฅฌ Crisp Texture
Strengthens cell walls for that perfect crunch consumers expect in quality lettuce
๐ก๏ธ Disease Resistance
Reduces susceptibility to tip burn, downy mildew, and bacterial leaf spot
๐ Enhanced Flavor
Improves sugar content and reduces bitterness for better taste profiles
๐ฆ Extended Shelf Life
Maintains freshness longer, reducing waste and improving marketability
๐ง Water Efficiency
Improves stomatal control and drought tolerance for consistent growth
๐ก๏ธ Stress Tolerance
Helps plants cope with temperature fluctuations and environmental stress
โ ๏ธ Tip Burn: Know the Signs
- Uniform green color
- Crisp, intact leaf margins
- Strong cell structure
- Extended shelf life
- Brown, necrotic leaf edges
- Starts at leaf tips/margins
- Calcium transport failure
- Unmarketable produce
SUITABLE FOR ALL LEAFY GREENS
Our formula is optimized for a wide variety of leafy vegetables:
Lettuce Varieties
- Romaine & Cos: Crisp hearts and upright growth
- Iceberg & Crisphead: Tight, dense heads
- Butterhead & Bibb: Soft, tender leaves
- Leaf Lettuce: Loose-leaf and oak varieties
- Baby Lettuce Mix: Mesclun and spring mix
Brassica Greens
- Kale: Curly, lacinato, and red Russian
- Collard Greens: Southern-style cooking greens
- Cabbage: Green, red, and Napa varieties
- Bok Choy: Baby and full-size pak choi
- Broccoli Raab: Tender shoots and florets
Specialty Greens
- Spinach: Baby and mature savoy types
- Swiss Chard: Rainbow and bright lights
- Arugula: Peppery salad rocket
- Microgreens: All leafy varieties
- Watercress: Aquatic and semi-aquatic
DERIVED FROM
APPLICATION RATES & DIRECTIONS
Our Lettuce Fertilizer can be applied through soil, foliar, or hydroponic methods for maximum flexibility.
๐ฑ Soil Application
| Application Method | Rate | Frequency | Notes |
|---|---|---|---|
| Per Plant | 3 grams (ยฝ tsp) | Every 4-6 weeks | Apply around base |
| Broadcast (per 100 sq ft) | 100-200 grams | Every 4-6 weeks | Water in thoroughly |
| Row Application | 2-4 lbs/100 ft row | At planting & mid-season | Side dress 2" from plants |
| Per Acre | 660-1500 lbs | Every 4-6 weeks | Based on plant density |
๐ Foliar Application
| Concentration | Application Rate | Frequency | Best Time |
|---|---|---|---|
| 0.5-1% Solution | 5-10 g/liter water | Every 1-2 weeks | Early morning/evening |
| Per Plant | 1 gram in 100ml water | Weekly | Avoid hot sun |
| Per Acre | 200-500 lbs in 100 gal | Every 1-2 weeks | Cool, calm conditions |
๐ง Hydroponic Application (per 100 gallons)
Hydroponic Nutrient Flow
| Growth Stage | Fertilizer Amount | Cal-Mag Plus | Target pH | Target EC/PPM |
|---|---|---|---|---|
| Seedling/Transplant | 0.25 lbs | 250-500 ml | 6.5-6.8 | 0.8-1.0 EC (560-700 PPM) |
| Vegetative Growth | 0.5 lbs | 500-1000 ml | 6.4-6.7 | 1.5-1.8 EC (1050-1260 PPM) |
| Mature/Harvest | 0.5 lbs | 1000 ml | 6.0-6.5 | 1.8-2.2 EC (1260-1540 PPM) |
๐ Optimal Feeding Through Growth Stages
- Fill tank with water to 80% capacity
- Add Cal-Mag Plus first (if using)
- Dissolve fertilizer completely while agitating
- Adjust pH after all nutrients added
- Top off to final volume
- 10-gallon system = ~12 plants
- 25-gallon system = ~30 plants
- 50-gallon system = ~60 plants
- 100-gallon system = ~120 plants
LETTUCE FERTILIZER CALCULATOR
COMPLETE MICRONUTRIENT PROFILE
Our formula includes all essential micronutrients in optimal ratios for leafy greens:
| Micronutrient | Form | Function in Leafy Greens |
|---|---|---|
| Iron (Fe) 0.10% | Chelated EDTA | Chlorophyll production, prevents yellowing |
| Manganese (Mn) 0.05% | Chelated EDTA | Photosynthesis, disease resistance |
| Zinc (Zn) 0.05% | Chelated EDTA | Growth hormones, leaf development |
| Copper (Cu) 0.05% | Chelated EDTA | Enzyme activation, lignin synthesis |
| Boron (B) 0.02% | Boric Acid | Cell wall strength, calcium uptake |
| Molybdenum (Mo) 0.0005% | Sodium Molybdate | Nitrogen metabolism, enzyme function |
Chelated Iron (Fe) - 0.10%
Chelated Manganese (Mn) - 0.05%
Chelated Zinc (Zn) - 0.05%
Chelated Copper (Cu) - 0.05%
Boron (B) - 0.02%
Molybdenum (Mo) - 0.0005%
GROW WITH CONFIDENCE
Below are important details on quality, returns, sustainability, and charitable efforts that set our product apart.
Product Quality Guaranteed
- All our products are manufactured in California, USA
- Tested by independent third-party laboratories for quality assurance
- Registered with the California Department of Food and Agriculture (CDFA)
- Rigorously tested to ensure products are free from heavy metals
Hassle-Free Return Policy
If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund.
Environmental Responsibility
We're committed to sustainable practices, including:
- Biodegradable packaging materials
- Precise nutrient formulation to reduce runoff
- Support for eco-friendly farming methods
- Ongoing research into organic solutions
Charitable Contributions
1% of all profits go to the Greenway Foundation, focused on improving educational opportunities for children. Learn more at greenway.foundation.
DOCUMENTS
FREQUENTLY ASKED QUESTIONS
Q Why is the Potassium (36%) so high?
Leafy greens consist largely of water. Potassium is the "regulator" nutrient that controls water pressure inside plant cells (turgor pressure).
The 36% Potassium delivers:
- Thicker cell walls (The "Crunch")
- Resistance to wilting under grow lights
- Significantly longer shelf life after harvest
Q What pH should I maintain for lettuce?
Lettuce is sensitive to pH. If the pH is too high, iron locks out (yellow leaves). If too low, calcium locks out (tip burn).
Q Will this fix "Tip Burn" on my lettuce?
Tip burn is a calcium transport issue. While this fertilizer facilitates calcium movement, it does not contain Calcium (as it reacts with phosphates in the bag).
The Solution: You must use this product with Cal-Mag Plus. The combination ensures rapid new growth is strong and burn-free.
Q Can I use this for baby leaf and microgreen production?
Absolutely! Adjust concentration based on crop maturity:
Baby Leaf (3-4 weeks to harvest):
- Use at 50-75% of standard concentration
- Apply every 5-7 days
- Target EC: 0.8-1.2
Microgreens (7-14 days to harvest):
- Use at 25% concentration after cotyledons emerge
- Single application usually sufficient
- Target EC: 0.4-0.6
Q How do I store the powder?
Our fertilizer is highly hygroscopic (it absorbs moisture from the air). To prevent clumping:
- Keep the bag sealed tight between uses
- Store in a cool, dry place out of direct sunlight
- If it clumps, simply break it up โ the efficacy is not affected
PAIRS WELL WITH
Cal-Mag Plus 2-0-0
Prevents tip burn and calcium deficiencies. Required supplement for hydroponic lettuce production.
BoostChelated Iron EDTA
Extra iron for deep green color and enhanced chlorophyll production in leafy greens.
QualityPotassium Sulfate 0-0-53
Additional potassium for improved texture and extended shelf life before harvest.
DISCOVER MORE GARDEN WISDOM
HAVE QUESTIONS?
Check out our full FAQ or contact our support team for personalized advice.