★★★★★
Plants looking great again :)
After using this for a few weeks the new growth looks stronger and the colours are way brighter again.
Free Shipping Over $70
Free Shipping
Limited Time Only
Reviews
5.0
★★★★★
Based on 2 reviews
Page 1 of 2
Indoor Plant Food Concentrate Fertiliser 100ml Makes 100 Litres
Price range: $24.60 through $36.50
Premium plant-food concentrate crafted for lush indoor growth.
✅ Fast-absorbing 16-4-14 NPK with essential trace elements
✅ Mix 1 mL per litre of water. Feed weekly in growth season, fortnightly in winter
✅ Promotes vibrant foliage, stronger roots, and year-round vitality
✅ Low phosphorus (4) suits sensitive indoor plants like aroids and ferns
Australian Owned & Manufactured
Free Shipping
Ending Soon
Boost Plant Growth
Complete Grow Indoor Plant Food
Premium Plant Food Made by Farmers Who Live and Breathe Plants. This distinctive concentrated formula is specifically crafted for indoor plants. It provides all the necessary nutrients for plants to thrive and flourish. Our indoor plant food contains a special blend of Nitrogen, Phosphorus, and Potassium (NPK) that is readily absorbed by plants.NPK Composition:
| Nutrient | Symbol | Percentage (%) |
|---|---|---|
| Nitrogen | N | 16% |
| Phosphorus | P | 4% |
| Potassium | K | 14% |
Plus all essential trace elements
Ingredients:
- Monopotassium Phosphate
- Calcium
- Iron (as Iron EDTA)
- Manganese (as Manganese Chelate)
- Copper (as Copper Sulphate)
- Zinc (as Zinc Chelate)
Directions for Use:
Add 1ml per litre of water (¼ teaspoon).
For optimal results, apply once a week during the growing season and once fortnightly during winter.Reviews
5.0
★★★★★
Based on 2 reviews
★★★★★
Plants looking great again :)
After using this for a few weeks the new growth looks stronger and the colours are way brighter again.
★★★★★
Best indoor plant food!
My Stromanthe Tri Colour and Calathea Makoyana- Peacock strutting off their beauty in the afternoon Sunshine 💚🪴💚 Just look at those colours! I spoil all my babies every two weeks with @completegrow Indoor Plant food nothing but the best because their worth it !
Indoor Plant Food Concentrate Fertiliser 100ml Makes 100 Litres
Looking for the best fertiliser for indoor plants? CompleteGrow’s Indoor Plant Fertiliser (NPK 16-4-14) is a professional-grade, low-phosphorus fertiliser formulated for delicate houseplants like aroids, ferns, pothos, and peace lilies. This gentle formula promotes lush leaves, strong roots, and steady growth without the risk of nutrient burn. Mix just 1 mL per litre of water — making it one of the most economical and effective fertilisers for indoor plants in Australia.
✅ Low-phosphorus NPK 16-4-14 formula safe for all indoor plant types
✅ Promotes lush foliage, stronger roots, and steady growth
✅ Fast-absorbing liquid indoor plant fertiliser — mix 1 mL per litre of water
✅ Ideal for aroids, ferns, pothos, philodendrons & peace lilies
✅ Australian-made – ships fast & free
NPK Ratio — Indoor 16-4-14
-
N
16
-
P
4
-
K
14
What NPK 16-4-14 Means (Indoor)
Indoor NPK formula with essential trace elements to keep houseplants lush, compact and resilient. Higher N for healthy foliage, supportive P for roots, and strong K for colour, turgor and stress tolerance.
- Lush foliage first: 16% nitrogen supports steady leaf production and rich green tone without excessive stretch when used regularly at indoor rates.
- Root & bud support: 4% phosphorus backs root growth and occasional flowering on ornamentals without overloading P in containers.
- Resilience & colour: 14% potassium improves water balance, stem strength and leaf colour; trace elements maintain enzyme function and consistent growth.
Read More
Indoors, plants live in limited media and stable climates, so balanced nutrition matters. This 16-4-14 profile feeds foliage-forward growers while keeping roots active and leaves firm under variable light and watering schedules. Trace elements (Fe, Mn, Zn, Cu, B, Mo) help prevent pale growth and patchy new leaves common in indoor conditions.
- Best for: Foliage plants, aroids, ferns, palms, herbs on windowsills, flowering houseplants between bloom cycles.
- Use pattern: Light, regular feeds on moist media; reduce in low light or cooler months; resume as growth resumes.
- Plant signals: Pale, soft new growth → increase frequency modestly; dull colour or weak stems → ensure potassium is present and consistent.
- Compatibility: Works in potting mixes, coco blends and hydro/LECA routines; safe alongside Cal-Mag when water is very soft.
Best For These Plants
Made for Aroids, Ferns & Indoor Plant Lovers
Monstera, Pothos & Leafy Plants Love It
How it Works
Mix 1ml per litre of water
Feed Your Plants
Watch Them Thrive
How Much to Mix
Indoor Plant Food — Mixing Calculator
Rate is fixed at 1 ml per litre (≈ ¼ teaspoon per litre). Enter litres and the totals update automatically.
Assumes 1 tsp ≈ 5 ml.
Reviews From Our Gardener's
Reviews
5.0
★★★★★
Based on 2 reviews
★★★★★
Plants looking great again :)
After using this for a few weeks the new growth looks stronger and the colours are way brighter again.
★★★★★
Best indoor plant food!
My Stromanthe Tri Colour and Calathea Makoyana- Peacock strutting off their beauty in the afternoon Sunshine 💚🪴💚 Just look at those colours! I spoil all my babies every two weeks with @completegrow Indoor Plant food nothing but the best because their worth it !
My Stromanthe Tri Colour and Calathea Makoyana- Peacock strutting off their beauty in the afternoon Sunshine 💚🪴💚 Just look at those colours! I spoil all my babies every two weeks with @completegrow Indoor Plant food nothing but the best because their worth it ! 🙌🏻 @time__and__place
Had to give my big girl a drink of water today so I placed her in the shower and now she’s too heavy for me to get out 🥴Thanks again to @completegrow for the wonderful Indoor liquid food my babies are so happy! 🌱@gdaygardeners
FAQ
Yes! The gentle 16-4-14 ratio is ideal for aroids, ferns, calatheas, succulents, hoyas, and more. It won’t burn roots or overwhelm sensitive plants.
Each 100ml bottle makes up to 100 litres of nutrient solution — enough to feed dozens of plants for months.
Too much phosphorus can damage indoor roots. Our 4% level supports steady root growth without build-up — perfect for pots & indoor planters.
Yes! Just use at the recommended dilution — it’s designed for regular use without stressing plants.
The Grow Blog: News, Tips, & Stories
25
Feb
Bloom Fertiliser: What It Does & When to Switch
16 Comments
05
Jan
What is Cal-Mag & When should you use it
16 Comments
18
Dec
Why Citrus Trees Struggle to Fruit
16 Comments
16
Nov
Why Iron Is Essential for Deep-Green Lawns
16 Comments
Indoor Plant Support
Made For Indoor Plant Growth.
Our Indoor Plant Food Concentrate is designed for indoor growers who want simple, balanced feeding for foliage plants, trailing varieties, compact potted plants and common houseplants.
Foliage favourite
Foliage Plants
Balanced indoor feeding for leafy growth.
Great for common foliage houseplants that need steady indoor nutrition without overcomplicating the routine.
- Monstera
- Pothos
- Philodendron
- Peace Lily
Indoor blooms
Flowering Houseplants
Supports colour, growth and indoor flowering care.
A reliable option for flowering indoor plants that benefit from regular, balanced feeding in pots.
- Anthurium
- Begonia
- African Violet
Compact pots
Small Pot Plants
Simple feeding for shelves, desks and small indoor pots.
Well suited to compact indoor plants where controlled, easy routine feeding matters more than heavy-strength fertiliser.
- Fittonia
- Peperomia
- Pilea
- Calathea
Trailing growth
Trailing Plants
Great for hanging and cascading indoor plants.
Useful for trailing varieties that need gentle but consistent support for leaf growth and longer runners.
- Pothos
- String of Hearts
- Spider Plant
- Tradescantia
Gentle routine
Sensitive Indoor Plants
Designed for easy indoor care routines.
A good fit for indoor plants that respond better to lighter, more controlled feeding rather than strong garden fertilisers.
- Calathea
- Prayer Plant
- Maidenhair Fern
- Fittonia
Beginner friendly
Common Houseplants
An easy starting point for everyday indoor plant care.
Ideal for growers who want one straightforward indoor feed across a range of common houseplants.
- ZZ Plant
- Rubber Plant
- Snake Plant
- Chinese Evergreen
See More Indoor Plant Types
Foliage Plants
- Monstera
- Pothos
- Philodendron
- ZZ Plant
- Rubber Plant
- Chinese Evergreen
- Dieffenbachia
- Syngonium
- Peace Lily
- Spider Plant
Flowering Indoor Plants
- Anthurium
- African Violet
- Begonia
- Peace Lily
- Kalanchoe
- Cyclamen
- Indoor Orchid Care
- Indoor Bromeliads
Trailing & Compact Plants
- String of Hearts
- Spider Plant
- Tradescantia
- Pilea
- Peperomia
- Fittonia
- Prayer Plant
- Calathea
Indoor Pot Use
- Desk plants
- Shelf plants
- Bedroom plants
- Living room plants
- Hanging baskets
- Small ceramic pots
- Decorative indoor planters
- Common houseplant collections