Perfect for apartment plants
"I only have a small collection so the concentrate is ideal. It takes up hardly any space and still makes enough feed to last me ages."
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NPK 16-4-14 + trace elements
Healthy growth formula
Indoor Plant FoodConcentrate Fertiliser 100ml Makes 100 Litres
Premium plant-food concentrate crafted for lush indoor growth.
- Fast-absorbing 16-4-14 NPK with essential trace elements for complete indoor plant nutrition
- Simple feeding schedule mix 1mL per litre; feed weekly during the growing season and fortnightly in winter
- Vibrant foliage and stronger roots supports healthy growth and year-round vitality
- Low-phosphorus formula suited to sensitive indoor plants, including aroids and ferns
$24.60
25¢
per litre
Choose select amount (milliliters)
“"I only have a small collection so the concentrate is ideal. It takes up hardly any space and still makes enough feed to last me ages."”
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From our growers
Description
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 16-4-14
Indoor & potted plants
Indoor & potted plantsGreat for
Monstera & philodendron
Fiddle leaf figs
Pothos & climbers
Ferns & palms
Peace lilies
Rubber plants
Hanging & potted plants
Office & balcony plants
Fiddle leaf figs
Pothos & climbers
Ferns & palms
Peace lilies
Rubber plants
Hanging & potted plants
Office & balcony plants
Why growers choose it
Made for indoor plants: a 16-4-14 formula crafted for potted plants.
Lush, green leaves: nitrogen-rich for fuller, greener foliage.
Strong roots & steady growth: potassium and phosphorus for healthy roots.
Lower phosphorus, on purpose: gentler on roots in pots.
Plus essential trace elements: iron, manganese, copper & zinc.
Fast, soluble nutrition: nutrients your plants can use straight away.
No unpleasant odours: a clean indoor formula that won’t leave your home smelling like foul organic odours.
A little goes a long way: just 1mL per litre of water.
✓ Australian owned & manufactured
Guaranteed Analysis
A complete indoor plant formula designed to support healthy foliage, strong roots and steady growth.
NPK 16-4-14 analysis
Essential trace elements
Added micronutrients help support healthy colour, growth and nutrient uptake.
How to mix & feed
Dilute with water and apply as part of your regular watering routine.
Standard mixing rate: 1mL per 1 litre(≈ ¼ teaspoon)
Quick mixing guide
How to apply
1. MeasureMeasure 1mL of fertiliser for every litre of water.
2. MixAdd to fresh water and mix thoroughly.
3. FeedWater evenly into the soil as part of your usual routine.
How often to feed
Growing SeasonSpring & summer
Weeklyonce a week
WinterSlower growth
Fortnightlyevery two weeks
Every plant is different.Fast growers may like a weekly feed, while slow growers and plants in low light may only need it every 2–3 weeks. Adjust to suit your plant and the season.
FAQ
How much do I mix?
- Rate: 1 mL per 1L of water.
A 100mL bottle makes up to 100L of ready-to-use feed and a 600mL bottle makes up to 600L.
How often should I feed?
- Growing season: Weekly.
- Winter: Approximately fortnightly.
Is it suitable for sensitive indoor plants?
Yes. Its lower phosphorus formulation is designed specifically for indoor and potted foliage plants, including popular aroids and ferns.
Can I use it at every watering?
For most indoor plants, follow the recommended feeding schedule rather than fertilising at every watering.
- Weekly during active growth.
- Approximately fortnightly during winter.
How long will a bottle last?
- 100mL: Makes up to 100L of feed.
- 600mL: Makes up to 600L of feed.
Can I use it outdoors?
Yes. It can also be used on suitable outdoor potted foliage plants at the same 1 mL per litre rate.
Reviews
5.0
Based on 7 reviews
Growing something great?
Share a quick review and a photo of your garden — it really helps other gardeners.
100% rated it 4 stars or higher
Genuine reviews from CompleteGrow customers.
Customer photos
4
Been using it throughout my indoor plant in…
Been using it throughout my indoor plant in which i have many - best product ive honestly used so far was worth trying out! definity going to be a lifetime customer
10/10 product best our there
10/10 product - actually gives you high strength npk - unlike the store bought ones ive been using which i read as having less than half the amount. This stuff works so well!❤️
Showing 3 of 7
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
Made for real houseplants
One Formula. A Whole Indoor Jungle.
One indoor plant fertiliser for the whole collection — foliage, trailing vines, palms, ferns and flowering houseplants grown in pots, planters and indoor containers.
1 mL per litre Mix with water and feed as directed on the label.
01
Climbing & Trailing
Pothos & Trailing Vines
Feeds the fast, leggy growth trailing plants put on through the warmer months.
- Pothos
- Philodendron
- Syngonium
- Scindapsus
Long gaps between leaves means it's running hungry.
02
Large Foliage
Monstera & Large Foliage
Big leaves need steady nitrogen. Supports leaf size, colour and new growth.
- Monstera
- Rubber Plant
- Fiddle Leaf Fig
- Bird of Paradise
New leaves coming in smaller than the last is the signal.
03
Soft Foliage
Palms & Ferns
Sensitive feeders — steady, diluted feeding keeps fronds green without browning the tips.
- Boston Fern
- Maidenhair Fern
- Parlour Palm
- Areca Palm
Water in at the base rather than spraying the fronds.
04
Everyday Indoor
Low-Light Houseplants
Routine feeding keeps low-light plants from going pale and leggy between repots.
- ZZ Plant
- Dracaena
- Calathea
- Chinese Evergreen
Pale, stretched growth shows up here first.
05
Compact & Structured
Bonsai & Mini Trees
Small pots hold very little root volume, so little and often beats a heavy feed.
- Ficus Bonsai
- Jade Bonsai
- Chinese Elm
- Serissa
Feed after watering, never onto dry roots.
06
Indoor Blooms
Flowering Indoor Plants
Balanced phosphorus and potassium support bud set and repeat flowering indoors.
- Anthurium
- Peace Lily
- Indoor Orchids
- African Violet
Keep feeding right through budding, not just before.
Foliage Plants
Leafy Favourites
- Monstera
- Pothos
- Philodendron
- Rubber Plant
- ZZ Plant
- Chinese Evergreen
- Dieffenbachia
- Syngonium
- Dracaena
- Fiddle Leaf Fig
Compact & Colourful
Small Pot Plants
- Fittonia
- Peperomia
- Pilea
- Calathea
- Prayer Plant
- Begonia
- Polka Dot Plant
- Tradescantia
- Aluminium Plant
- Nerve Plant
Trailing & Hanging
Cascading Plants
- Golden Pothos
- Marble Queen Pothos
- String of Hearts
- String of Turtles
- Spider Plant
- Scindapsus
- Heartleaf Philodendron
- Philodendron Brasil
- Hoya
- English Ivy
Palms & Ferns
Softer Foliage
- Boston Fern
- Maidenhair Fern
- Bird's Nest Fern
- Button Fern
- Kimberley Queen Fern
- Parlour Palm
- Areca Palm
- Lady Palm
- Kentia Palm
- Majesty Palm
Flowering Indoor
Indoor Blooms
- Anthurium
- Peace Lily
- Indoor Orchids
- Phalaenopsis
- African Violet
- Bromeliads
- Kalanchoe
- Cyclamen
- Begonia
- Indoor Jasmine
Bonsai & Miniature
Compact Trees
- Ficus Bonsai
- Jade Bonsai
- Chinese Elm
- Serissa
- Fukien Tea
- Money Tree
- Dwarf Umbrella Tree
- Portulacaria Afra
- Juniper Bonsai
- Carmona
Better Feeding. Better Plants.
A concentrated indoor plant food designed to make routine feeding simple. Measure a small amount, mix with water and feed your houseplants as part of their normal watering routine.
CONCENTRATED FORMULA
Just 1 mL per litre of water.
THREE SIMPLE STEPS
Measure. Mix. Feed.
1 mL/L
Add to your watering can and mix thoroughly with water.
Water the potting mix evenly as part of your normal routine.
Feeding Guide
Adjust feeding with the season.
ACTIVE GROWTH
Feed weekly
WINTER
Every 2 weeks
INDOOR NUTRITION
For thriving potted plants.
QUICK MIXING CALCULATOR
How Much to Mix
Enter how much water you are preparing and we'll calculate the Indoor Plant Food amount.
Litres
Add this much
Enter an amount
Your Indoor Plant Food amount will appear here.
Indoor rate · 1 mL per litreHow Much to Mix
Reviews From Our Gardener's
5.0
Based on 7 reviews
Growing something great?
Share a quick review and a photo of your garden — it really helps other gardeners.
100% rated it 4 stars or higher
Genuine reviews from CompleteGrow customers.
Customer photos
4
Perfect for apartment plants
"I only have a small collection so the concentrate is ideal. It takes up hardly any space and still makes enough feed to last me ages."
Been using it throughout my indoor plant in…
Been using it throughout my indoor plant in which i have many - best product ive honestly used so far was worth trying out! definity going to be a lifetime customer
10/10 product best our there
10/10 product - actually gives you high strength npk - unlike the store bought ones ive been using which i read as having less than half the amount. This stuff works so well!❤️
Showing 3 of 7
Verified Buyer
Verified Buyer
“
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
@time__and__place
★★★★★
Verified Buyer
“
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
@gdaygardeners
★★★★★
Verified Buyer
WHY INDOOR FEEDING MATTERS
Nutrition made for life in a pot.
Indoor plants rely on the limited soil inside their pot. CompleteGrow combines primary NPK nutrients with micronutrients to support healthy foliage, roots and steady plant growth.
Healthy foliage
Strong roots
Balanced growth
INSIDE COMPLETEGROW
Four parts. One balanced feed.
Each nutrient plays a different role in supporting container-grown indoor plants.
N
Nitrogen
Leaf & foliage growth
WHY NITROGEN MATTERS
Nitrogen is an essential part of normal vegetative growth. It supports leaf and shoot development and contributes to chlorophyll formation.
- Supports healthy foliage development.
- Contributes to normal chlorophyll production.
- Supports active vegetative growth.
CompleteGrow combines nitrogen with phosphorus, potassium and micronutrients for broader, balanced plant nutrition.
P
Phosphorus
Roots & energy transfer
WHY PHOSPHORUS MATTERS
Phosphorus supports normal root development and plays an important role in the way plants store and transfer energy during growth.
- Supports healthy root development.
- Contributes to normal energy-transfer processes.
- Works alongside nitrogen and potassium.
Requirements can vary between plant species, potting mixes and stages of growth, so always follow the product directions.
K
Potassium
Strength & water balance
WHY POTASSIUM MATTERS
Potassium contributes to normal water regulation, enzyme activity and several processes involved in healthy plant growth.
- Supports normal water regulation.
- Contributes to general plant vigor.
- Supports balanced plant development.
Potassium complements nitrogen and phosphorus by supporting important internal plant processes.
Micronutrients
Supporting the smaller details
WHY MICRONUTRIENTS MATTER
Plants require some mineral nutrients in much smaller quantities than nitrogen, phosphorus and potassium, but they still contribute to normal plant development.
- Support normal plant metabolic processes.
- Complement the primary NPK nutrients.
- Help provide a more complete feeding profile.
Together, primary nutrients and micronutrients provide a broader nutritional foundation for indoor plants growing in containers.
Made for plants that live in pots.
Balanced nutrition designed for houseplants grown in pots, planters and indoor containers.
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.
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.
