Free 100ml Indoor Plant Food on $100+ Orders — Code: FREEFOOD
All Purpose Indoor Plant Food Premium Fertiliser 500ml makes 500 Litres
$18.00 – $34.00
Complete Grow All Purpose Plant Food is a fast-acting, balanced 20-20-20 formula ideal for herbs, veggies, flowers & ornamentals.
Delivers quick absorption for greener foliage and healthier growth — year-round, in pots or garden beds.
Australian Owned & Manufactured
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Boost Plant Growth
Complete Grow Concentrated All Purpose Plant Food
Ideal for feeding herb gardens, veggies, berries, flowers and ornamental plants. Promotes healthier growth and greener foliage. This balanced, fast-acting formula delivers the right nutrition for quick absorption. Suitable for all plants in pots and gardens. Can be used year-round.How NPK Works:
- N – Nitrogen: Encourages new stems, flowers, and fruit growth
- P – Phosphorus: Strengthens roots and supports healthy flower and fruit development
- K – Potassium: Boosts overall plant health and disease resistance
Typical Analysis:
- Nitrogen (N): 20%
- Phosphorus (P): 20%
- Potassium (K): 20%
- Plus all trace elements
Directions for Use:
Add 1mL per litre of water (approx ¼ teaspoon). Apply once a week during the growing season and once fortnightly during winter.Safety Directions:
⚠️ Not to be taken. Keep out of reach of children. Wash all edible plants thoroughly before eating.Why Choose Our All Purpose Liquid Fertilizer
Premium All Purpose Liquid Fertilizer – Balanced NPK 20-20-20 with essential trace elements. Ideal for vegetables, herbs, flowering plants, hydroponics, and indoor pots. Fast absorption, weekly feeding. 100% Australian-made with free shipping.
Bring your houseplants to life with CompleteGrow’s All-Purpose Indoor Plant Food. This powerful yet gentle liquid fertiliser is formulated for lush leaf growth, stronger roots, and vibrant colour in all your indoor greens. Ideal for potted herbs, tropical plants, foliage, and flowering houseplants.
Product Highlights:
500ml bottle makes up to 500 litres
Designed for indoor plants – safe and non-toxic
Fast-acting formula with balanced NPK nutrients
Encourages root strength, leaf health, and overall vitality
Easy to apply – just mix with water and feed weekly
Perfect For:
Monstera, pothos, peace lilies, and ferns
Herbs and potted veggies
Australian indoor climate and plant varieties
NPK Ratio
-
N
20
-
P
20
-
K
20
What NPK 20-20-20 Means
A balanced, all-purpose fertilizer—also called 20-20-20 fertilizer or 20 20 20 fertilizer—supplying equal parts nitrogen (N), phosphorus (P) and potassium (K) for even vegetative growth, strong roots and steady flowering across vegetables, houseplants, ornamentals and lawns.
- Balanced nutrition: Equal N-P-K (20-20-20) supports leafy growth (N), rooting & bud set (P), and vigor & stress tolerance (K).
- All-purpose use: Great “all purpose fertilizer” for seedlings, transplants, herbs, greens, houseplants and ornamentals—ideal between bloom-booster cycles.
- Flexible formats: Works as a water-soluble powder or a ready-to-mix 20 20 20 fertilizer liquid for soil, coco or hydroponics.
Read More
What is NPK 20 20 20? It’s a complete, balanced plant food delivering 20% nitrogen (for chlorophyll and foliage), 20% available phosphate (P2O5 for roots and blooms) and 20% soluble potash (K2O for quality, color and resilience). Because the ratio is even, this 20-20-20 fertilizer is a reliable “do-most-things” feed that keeps growth steady without pushing plants too hard in any single direction.
- Use for vegetables, flowers, shrubs, lawns and indoor plants when a general, balanced feed is desired.
- Mix as directed by your product label; apply to moist media for consistent uptake. Can be used as a foliar spray where appropriate.
- If your water is very soft or plants are heavy feeders, pair with a calcium-magnesium supplement for complete nutrition.
Best For These Plants
Monstera, Indoor Herbs (basil, mint, parsley)
Flowering Houseplants, Fiddle Leaf Fig, Peace Lily
How it Works
Add 1mL per litre of water
Feed Your Plants
Watch Them Thrive
Reviews From Our Gardener's
My monstera has never looked better. Easy to use and lasts forever!
Sarah T. – VIC
Verified Buyer
The best indoor plant fertiliser I’ve used. It even revived my struggling succulents!
Dylan R. – NSW
Verified Buyer
FAQ
The best indoor plant food is a balanced, liquid fertilizer with essential nutrients like nitrogen (N), phosphorus (P), and potassium (K). Our All-Purpose Indoor Plant Food is specially formulated for houseplants, providing fast absorption and visible results within weeks.
Indoor plants thrive on plant food that delivers complete nutrition without overfeeding. Look for a formula designed for foliage and root health. Our 500ml formula makes 500 litres — offering long-lasting nourishment without harsh chemicals.
Yes. Indoor plants don’t have access to the natural nutrients found in outdoor soil. Regular feeding with plant food helps maintain leaf colour, prevent yellowing, and support steady growth in potted environments.
Technically yes, but it’s not always ideal. Indoor plant food is usually milder and formulated for lower light and humidity conditions. For outdoor plants, use a stronger, weather-resistant fertilizer made for outdoor use.
The Grow Blog: News, Tips, & Stories
12
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Sep
What is NPK 20-20-20 Fertiliser?
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21
Aug
Organic vs NPK Fertilisers: What Works Best?
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