Better Nutrition. Better Growth.
CompleteGrow All Purpose Plant Food delivers double-strength 20-20-20 precision nutrition for indoor plants, garden beds and hydroponics. Ultra-concentrated and water-soluble, the formula makes up to 250 times its volume in ready-to-use plant feed. We let the plants do the talking.
NPK 20-20-20
Formula
Concentrate
& Hydro
Grow Better With the Right Formula.
Every plant has different nutritional needs. Find the CompleteGrow formula designed to support stronger roots, healthier foliage, bigger blooms and productive harvests.
All Purpose Plant Food
- ✓ Balanced NPK 20-20-20
- ✓ Indoor, outdoor and hydro
- ✓ Water-soluble concentrate
Flowering & Fruiting
- ✓ Supports flower development
- ✓ Supports fruit formation
- ✓ Flowering and fruiting crops
Cal-Mag
- ✓ Calcium and magnesium support
- ✓ Supports strong new growth
- ✓ Suitable for soil and hydro
Indoor Plant Nutrition
- ✓ Balanced for houseplants
- ✓ Supports healthy green foliage
- ✓ Simple, low-mess feeding
Citrus Plant Food
- ✓ Designed for citrus trees
- ✓ Supports growth and fruiting
- ✓ Suitable for pots and gardens
Premium Plant Nutrition. Professional Results.
Concentrated formulas designed to support stronger growth, healthier plants and productive harvests without complicated feeding routines.
Supports Full-Cycle Growth
Targeted nutrition for stronger roots, healthy foliage, flowering and productive harvests.
Professional-Grade Nutrients
Quality mineral nutrients selected for consistent, predictable feeding across different plant types.
Balanced NPK 20-20-20
Equal nitrogen, phosphorus and potassium for versatile all-purpose plant feeding.
Made for Every Growing Space
Options for indoor plants, garden beds, citrus, flowering crops and hydroponic systems.
Real Results. In Just 7 Days.
The same garden bed, photographed one week apart after feeding with CompleteGrow NPK 20-20-20.
Before feeding
Smaller plants, fewer leaves and less even growth.
After 7 days with CompleteGrow
Fuller growth, improved structure and greener foliage.
Real Growers, Real Results.
From backyard gardens to indoor jungles, see how growers are achieving healthier plants and stronger growth with CompleteGrow.
My plants are thriving.
“Fantastic results. My plants look healthier, stronger and more alive than before.”
Perfect for indoor plants.
“Easy to use, no bad odor, and gentle enough for my indoor plant collection.”
One of the best I’ve used.
“Simple to use and one of the best plant foods I’ve come across.”
See CompleteGrow in Real Gardens
Tap a customer post to read their full story and see the CompleteGrow product they used.
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What Goes Into
Better Plant
Nutrition.
CompleteGrow is formulated with high-purity mineral inputs and carefully selected trace elements, blended in precise balance for cleaner, more consistent feeding.
Every ingredient is chosen for performance, plant safety and dependable results you can trust.
Better nutrition, from the inside out.
Nitrogen (N)
High-purity sources to support lush, healthy leaf growth.
Phosphorus (P)
Essential for strong root development and energy transfer.
Potassium (K)
Supports plant vigor, resilience and flowering quality.
Calcium (Ca)
Strengthens cell walls and supports plant structure and growth.
Magnesium (Mg)
A key component of chlorophyll for rich, healthy green foliage.
Trace Elements
Carefully selected micronutrients for balanced plant performance.
Find Your Formula. Grow Better.
Precision mineral blends designed to feed, protect, and maximize every plant in your collection.
All Purpose Plant Food
Double-strength balanced nutrition for stronger roots, greener foliage and healthy growth across almost every plant type.
- Suitable for indoor, outdoor and hydroponic plants
- Balanced nutrition for full-cycle growth
- Concentrated formula for efficient feeding
Flowering & Fruiting
High-performance nutrition designed to support stronger flowering, fruit formation and more productive harvests.
- Supports flower development and fruit formation
- Ideal for tomatoes, chillies and flowering crops
- Concentrated powder for precise feeding
Indoor Plant Food
Balanced liquid nutrition designed for leafy houseplants, healthy foliage and steady indoor growth.
- Supports healthy leaf colour and new growth
- Suitable for a wide range of houseplants
- Simple low-mess liquid feeding
Citrus & Fruit
Specially designed for lemons, limes, oranges, mandarins and other productive fruiting plants.
- Supports healthy fruit and productive growth
- Suitable for citrus and backyard fruit trees
- Helps maintain vigorous green foliage
Lawn Food
Concentrated lawn nutrition designed to support greener colour, healthy coverage and reliable outdoor growth.
- Supports deeper green lawn colour
- Helps maintain strong, even growth
- Suitable for regular lawn feeding
NPK 20-20-20 Powder
Double-strength water-soluble powder with balanced nitrogen, phosphorus and potassium for versatile feeding.
- Balanced full-cycle plant nutrition
- Fast-dissolving concentrated powder
- Suitable for soil and hydroponic use
NPK 20-20-20 Powder
Double-strength water-soluble powder with balanced nitrogen, phosphorus and potassium for versatile feeding.
- Balanced full-cycle plant nutrition
- Fast-dissolving concentrated powder
- Suitable for soil and hydroponic use
NPK 20-20-20 Powder
Double-strength water-soluble powder with balanced nitrogen, phosphorus and potassium for versatile feeding.
- Balanced full-cycle plant nutrition
- Fast-dissolving concentrated powder
- Suitable for soil and hydroponic use
See How Easy Feeding Can Be.
Select NPK Blend
See CompleteGrow NPK 20-20-20 up close before mixing.
Mix
Add the recommended amount to water and mix well.
Feed & Grow
Water your plants and let the nutrients do the work.
Not All Fertilizers Are Equal.
Precision-formulated plant nutrition that delivers more usable nutrients, greater versatility and better value from every feed.
Switch to CompleteGrow with Confidence.
Get concentrated, professional-grade plant nutrition without paying more for water, fillers or unnecessary bulk.
One Tub. Big Yield. Up to 264 Gallons.
One compact 17.6 oz Tub makes between 44 and 264 gallons of plant feed, depending on the feeding strength used.
- 44–264 gallons from one compact tub
- Adjustable strength for different plants
- Less storage and better value per feed
3 tsp per 5 L
1 tsp per 5 L
½ tsp per 5 L
Makes up to 264 gallons of feeding
One tub. More feed. Less storage.
*Calculations assume one level teaspoon weighs approximately 5g. Actual coverage may vary slightly depending on powder density and measuring method.
Simple Advice. Better Growth.
Expert tips and practical growing advice to help you feed smarter, solve plant problems and grow with confidence.
Best Fertilizer for Roses
Learn which nutrients support healthy stems, abundant blooms and vibrant flower colour.
How Often Should You Feed Citrus?
Follow a simple feeding routine for stronger roots, healthier foliage and better fruit production.
Fix Yellow Leaves Fast
Discover common causes of yellow leaves and how to correct feeding, watering and nutrient problems.
Garden Bed Feeding Calendar
Know what to feed and when with a simple seasonal guide for productive garden beds.
Plant Fertilizer FAQs.
Quick answers about CompleteGrow plant fertilizer, mixing, plant care, orders and shipping in the USA.
What is NPK 20-20-20 fertilizer?
NPK 20-20-20 is a balanced plant fertilizer containing equal amounts of nitrogen, phosphate and potash. It supports healthy leaves, roots, flowers and overall growth.
Which plants can I use CompleteGrow fertilizer on?
CompleteGrow 20-20-20 can be used on vegetables, flowers, fruit plants, herbs, orchids and indoor plants. Use a lighter mix for orchids, bonsai, hoya and succulents.
How much plant feed does one 17.6 oz tub make?
One 17.6 oz tub makes approximately 44 to 264 gallons of plant feed. The final amount depends on how strong you mix the fertilizer.
How do I mix CompleteGrow 20-20-20 fertilizer?
Use about 2¼ teaspoons per gallon for outdoor plants, ¾ teaspoon per gallon for indoor plants, or ⅜ teaspoon per gallon for light-feeding plants.
How often should I apply plant fertilizer?
Apply every 7 to 14 days while plants are actively growing. Feed less often when plant growth slows or during colder weather.
Can CompleteGrow be used in hydroponics?
Yes. CompleteGrow water-soluble fertilizer can be used in soil, pots and hydroponic systems. Start with the recommended rate for your plants and growing system.
Can I use CompleteGrow as a foliar spray?
Yes. Use a half-strength solution and spray during the cooler part of the day. Avoid spraying leaves in strong sunlight or extreme heat.
Where can I buy CompleteGrow plant fertilizer in the USA?
You can buy CompleteGrow NPK 20-20-20 plant fertilizer directly from the CompleteGrow USA online store.
Why are my plant leaves turning yellow?
Yellow leaves may be caused by overwatering, underwatering, poor drainage, low light, damaged roots or a nutrient shortage. Check the growing conditions before feeding.
Will fertilizer fix yellow leaves?
Fertilizer may help when yellow leaves are caused by low nutrients. It will not fix poor drainage, root damage, low light or incorrect watering.
What are the signs of too much fertilizer?
Signs may include brown leaf tips, dry edges, wilting, slow growth or a white crust on the soil. Stop feeding and flush the soil with clean water.
Is CompleteGrow suitable for orchids and succulents?
Yes. Use the light-feeding rate of about ⅜ teaspoon per gallon for orchids, bonsai, succulents, hoya and other plants that prefer gentler feeding.
How can I reduce the risk of fertilizer burn?
Measure carefully, dissolve the fertilizer fully and use the correct rate. Avoid applying a strong mix to dry, damaged or stressed plants.
Should I fertilize a newly repotted plant?
Give the plant time to settle first. Fresh potting mix may already contain nutrients, so wait until the plant begins growing normally again.
Should indoor plants be fertilized during winter?
Feed less often when plants are growing slowly. Plants kept warm under strong grow lights may still need light feeding during winter.
How should powdered plant fertilizer be stored?
Keep the container tightly closed in a cool, dry place. Protect the fertilizer from moisture, direct sunlight, children and pets.
Does CompleteGrow offer free US shipping?
Qualifying US orders over $40 receive free standard shipping. The final shipping cost is shown at checkout before payment.
How long will my CompleteGrow order take to arrive?
Delivery time depends on your location and shipping service. A tracking link is sent after the order has been dispatched.
Can I change my shipping address after ordering?
Contact CompleteGrow as soon as possible with your order number and correct address. An address may not be changed after the parcel has been dispatched.
What should I do if my order arrives damaged?
Take clear photos of the package and damaged product. Contact CompleteGrow with the photos and your order number so the issue can be reviewed.
What if I receive the wrong product?
Keep the product and packaging together. Contact CompleteGrow with your order number and a photo of the item you received.
My tracking says delivered, but I cannot find my order. What should I do?
Check entrances, safe places, parcel lockers and nearby neighbors. Contact the carrier using your tracking number, then contact CompleteGrow if it is still missing.
Does CompleteGrow offer a money-back guarantee?
CompleteGrow purchases are covered by a 30-day money-back guarantee, subject to the current refund policy and eligibility requirements.
How can I contact CompleteGrow?
Visit the CompleteGrow contact page and include your order number, product name and a short description of your question.
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