Skip to product information
Sold out

Liquid Fertilizer Concentrate 18-6-12 Water Soluble

$12.49
$10.49
 per 
Shipping calculated at checkout.

GUARANTEED!
your plant(s) will love it.

Product description

Make Your Own Premium Liquid Fertilizer - Stop Paying for Water!


Why Pay for Water When You Can Make Your Own Liquid Fertilizer?

Think about it: Most liquid fertilizers are 90% water. You're paying premium prices plus shipping costs for heavy bottles filled with water you already have at home.

18-6-12 Water Soluble changes everything. One tiny 0.5 lb bag makes 128 gallons of fresh, professional-strength liquid fertilizer. No more overpriced bottles. No more storage issues. No more paying to ship water across the country.

This is how smart gardeners fertilize.


Why the 18-6-12 Formula works:

🔬 The Science Behind the GrowScripts Liquid Fertilizer:

Most liquid fertilizers use weaker formulas. That's fine for basic plant survival, but if you want explosive growth and maximum yields, you need professional-strength nutrition.

Water Soluble Smart Mix 18-6-12 delivers:

  • 18% Nitrogen = 2X more growth power than typical 9% formulas
  • 6% Phosphorus = 2X stronger root development and flowering
  • 12% Potassium = 2X better disease resistance and fruit quality
  • Plus Calcium, Magnesium & Trace Elements = Complete nutrition matrix

📊 Formula Comparison:

Fertilizer Type NPK Ratio Strength Results
Water Soluble Smart Mix 18-6-12 Professional Maximum Growth
Typical Liquid 9-3-6 Consumer Grade Basic Maintenance
Competitor Liquid 12-4-8 Moderate Average Results
Generic Brands 8-2-4 Weak Minimal Impact

Translation: While others feed your plants snacks, Smart Mix serves a feast.

Key features

Make 128 Gallons of Fresh Liquid Fertilizer: One compact bag replaces dozens of heavy bottles. Mix only what you need, when you need it.
Professional 18-6-12 Formula = 2X Stronger Than Competition: Double the concentration of typical liquid fertilizers. Same nutrition pros use, not watered-down consumer formulas.
Stop Paying Shipping Costs for Water: Why pay $15-25 per bottle for mostly water? Smart Mix costs pennies per gallon of finished liquid fertilizer.
Instant Absorption with Calcium & Trace Elements: Water-soluble formula feeds plants immediately. Includes calcium, magnesium, iron, and zinc for complete nutrition.
Compact Storage: Forget bulky liquid containers taking up garage space. One small bag stores anywhere.

Ingredients

GrowScripts ULTRA WS is crafted with precision. Every ingredient is chosen for maximum impact: Potassium Nitrate, Ammonium Nitrate, Mono Ammonium Phosphate, Urea, Amino Form Nitrogen, Calcium Carbonate, Magnesium Sulfate, Magnesium Gluconate, Potassium Silicate, Nickel Sulfate, Iron Sulfate, Boric Acid, Sodium Gluconate, Yucca, Citric Acid, Molybdenum, Zinc (Zn) chelated with EDTA, Manganese (Mn) chelated with EDTA, Copper (Cu) chelated with EDTA, Iron (Fe) chelated with EDTA

How to use

1. Mix 1/2 teaspoon of GrowScripts ULTRA WS per gallon of water—half the amount needed by other fertilizers.
2. Stir well and apply evenly across soil or as a foliar spray.
3. Use once every 1-2 weeks for optimal results, ensuring your plants thrive all year long.

Why?

GrowScripts ULTRA WS isn’t just another fertilizer—it’s the future of plant care. With our patented super-concentrated formula, you’re giving your plants the nutrients they need to outperform, outgrow, and outlast the competition. This is plant care reimagined.

Makes how much?

Each 0.5 lb package of GrowScripts ULTRA WS 18-6-12 contains 64 teaspoons (tsp.) of product. With the recommended application rate of just 1/2 teaspoon per gallon of water—which is half the amount typically recommended by other products—this package makes a total of 128 gallons of ready-to-use solution. That means you’re getting double the coverage with each package, making it a cost-effective and efficient way to feed your plants while ensuring they receive the balanced nutrition they need.

View full details

Liquid Fertilizer Concentrate 18-6-12 Water Soluble

$12.49
$10.49
 per 

Recently viewed products

How Smart Mix Works:

Step 1: Mix Fresh Liquid Fertilizer

Add just 1/2 teaspoon per gallon of water. Stir until dissolved.

Step 2: Apply to Any Plant

Use on houseplants, vegetables, citrus, flowers, herbs - everything thrives with Smart Mix.

Step 3: Watch Plants Respond in Days

Water-soluble nutrition absorbs instantly. Expect greener leaves and stronger growth fast.

Step 4: Save Money & Storage Space

One bag lasts months. No more buying expensive liquid fertilizer bottles.


Why Smart Gardeners Choose Concentrate:

The Math That Matters:

  • Typical liquid fertilizer bottle: $20 for 32 oz (makes ~8 gallons) = $2.50/gallon
  • Smart Mix concentrate: $12.49 for 128 gallons = $0.10/gallon
  • Your savings: Over 95% cost reduction per gallon!

The Strength That Matters Even More:

Why 18-6-12 Changes Everything:

  • Professional growers use 18-6-12 for maximum yields
  • Consumer brands use 9-3-6 to save money on ingredients
  • You get 2X more actual nutrition per application
  • Faster growth, bigger harvests, stronger plants - guaranteed

Real Example: To match one Smart Mix feeding, you'd need to use double the amount of typical liquid fertilizer. That means even more money wasted on weak formulas.

Environmental Benefits:

  • No plastic bottles to recycle or throw away
  • Minimal shipping weight reduces carbon footprint
  • Zero preservatives needed - always fresh when mixed
  • Compact packaging reduces waste

Professional Results:

  • 18-6-12 NPK ratio preferred by commercial growers
  • Complete nutrition including secondary nutrients and micronutrients
  • pH balanced for optimal plant uptake
  • No filler ingredients - pure plant nutrition

Perfect For All Your Plants:

🏠 Houseplants & Indoor Gardens

Create custom liquid fertilizer for pothos, snake plants, fiddle leaf figs, and all indoor favorites.

🍅 Vegetables & Herbs

Mix fresh liquid fertilizer for tomatoes, peppers, basil, lettuce - perfect for container gardens and raised beds.

🍋 Citrus & Fruit Trees

Professional-strength nutrition for container citrus, avocados, and fruiting plants.

🌸 Flowers & Ornamentals

Boost blooms and foliage with liquid fertilizer made fresh every time.

💧 Hydroponics & Soilless Growing

Clean, water-soluble formula perfect for hydroponic systems and soilless media.

Application Instructions:

For Regular Feeding:

  • Mix: 1/2 teaspoon per gallon of water
  • Frequency: Every 1-2 weeks during growing season
  • Application: Water soil thoroughly or use as foliar spray

For Transplanting:

  • Mix: 1/4 teaspoon per gallon (half strength)
  • Use: First watering for new transplants
  • Benefit: Reduces transplant shock

For Hydroponics:

  • Mix: Follow EC/TDS meter readings
  • Start: 1/4 teaspoon per gallon, adjust as needed
  • Monitor: pH and nutrient levels regularly

What's Included:

  • One 0.5 lb bag of Smart Mix concentrate
  • Detailed mixing instructions
  • Application calendar for different plants
  • Measuring spoon for accurate mixing
  • Storage tips to maintain freshness

Frequently Asked Questions

Q: How is making my own liquid fertilizer better than buying bottles?
A: You save 95% on costs, eliminate storage of bulky containers, always have fresh fertilizer available, and stop paying shipping costs for water. Plus our professional 18-6-12 formula is 2X stronger than most bottled fertilizers (which are typically weak 9-3-6).

Q: What makes 18-6-12 better than other liquid fertilizer formulas?
A: 18-6-12 is what professional growers use. It provides double the nitrogen (18% vs 9%), double the phosphorus (6% vs 3%), and double the potassium (12% vs 6%) compared to typical consumer liquid fertilizers. More nutrition = faster growth and bigger yields.

Q: How long does Smart Mix concentrate last?
A: Years when stored in a cool, dry place. Unlike liquid fertilizers that can separate or degrade, dry concentrate maintains potency indefinitely.

Q: Can I make different strengths of liquid fertilizer?
A: Absolutely! Use full strength (1/2 tsp/gallon) for heavy feeders, half strength for delicate plants, or custom mix for specific needs. You control the concentration.

Q: Is homemade liquid fertilizer as effective as store-bought?
A: More effective! Store-bought liquid fertilizers use weak formulas (usually 9-3-6) because stronger formulas cost more to produce. Our 18-6-12 concentrate gives you professional-grade nutrition without the water markup.

Q: What plants can I use this liquid fertilizer on?
A: Everything! Houseplants, vegetables, herbs, citrus, flowers, trees - any plant that benefits from liquid nutrition. One concentrate for your entire garden.

Q: How quickly will I see results?
A: Most gardeners see greener foliage within days. Water-soluble nutrients absorb immediately, providing rapid plant response.

Q: Is this safe for organic gardening?
A: While not certified organic, Smart Mix contains no harmful chemicals and is safe for food plants. Many organic gardeners use it as part of their nutrition program.

Q: Can I store leftover mixed liquid fertilizer?
A: Best to mix only what you need for immediate use. However, mixed solution can be stored for up to a week in a cool place. Fresh is always better!

Q: How does this compare to granular fertilizers?
A: Liquid fertilizers provide immediate nutrition since nutrients are already dissolved. Granular fertilizers release slowly over time. Smart Mix gives you the speed of liquid with the economy of concentrate.

Q: Will this work in hard water areas?
A: Yes! Smart Mix dissolves completely even in hard water. The chelated micronutrients remain available to plants regardless of water quality.