fresh from the potting bench
The Grow Blog
Straight-talking feeding advice from the CompleteGrow growers. What to feed, when to feed it, and why it works.
- 30 stories
- Written by our growers
- New ones every few weeks
The True Cost of $5 Supermarket Fertiliser (And What’s Actually Inside)
A $5 fertiliser is built around a low shelf price. CompleteGrow is built around concentration, declared nutrients, trace elements and a more premium feeding…
Read the story The True Cost of $5 Supermarket Fertiliser (And What’s Actually Inside)spring has sprung
October in the garden
- Growth is picking up, so start feeding regularly again.All Purpose Plant Food
- Switch flowering and fruiting plants to a bloom feed once buds form.Read: Spring is here…
- Give citrus a feed for the spring flush of new leaves and blossom.Citrus Fertiliser
- Skip the coffee grounds on your pot plants.Read why
Tick them off as you go. New jobs each season.
oldies but goodies
Readers’ favourites
The older stories people keep coming back to.
pull one up and have a read
Latest stories
Showing: All stories30
Potted plantsFresh this seasonWhy Coffee Grounds & Eggshells Aren’t Helping Your Potted Plants
Coffee grounds contain nitrogen and eggshells contain calcium, but neither is a complete, fast-acting fertiliser for pots. Learn when to compost them—and what your potted plants actually need.Read the story
Flowers & fruitFlowers & fruitSpring is here, is it time to switch to a bloom fertiliser?
Spring growth is not only about greener leaves. Learn when established plants are ready for a bloom fertiliser, why excess nitrogen can delay flowers and fruit, and how to adjust…Read the story
FertiliserFertiliserMineral Fertiliser Does Not Deserve Its Bad Reputation
Organic fertiliser sounds natural, but does it feed plants as reliably as mineral fertiliser? This simple growth trial compares plant response, leaf colour and final growth to show why available…Read the story
FertiliserFertiliserThe Biggest Mistakes People Make With Fertiliser
Many fertiliser problems come from weak, incomplete or badly matched products. Learn the biggest mistakes gardeners make with fertiliser and why proper mineral nutrition matters for stronger, healthier plants.Read the story
FertiliserFertiliserWithout Mineral Fertiliser, the World Would Starve
Organic fertiliser sounds natural and safe, but modern food production depends on mineral fertiliser. Learn why mineral nutrients are essential for feeding plants, supporting farmers and growing enough food at…Read the story
FertiliserFertiliserDifferent NPK Ratios: Fertiliser Guide
Learn what NPK ratios mean, how nitrogen, phosphorus and potassium affect plant growth, and how to choose the right CompleteGrow fertiliser for indoor plants, citrus, cactus, hydroponics and general garden…Read the story
Potted plantsPotted plantsWhy Indoor Plants Stop Thriving
Most houseplants do not decline because people stop caring for them. They decline because the nutrition in the pot runs out. This guide explains why indoor plants often stall after…Read the story
Flowers & fruitFlowers & fruitBloom Fertiliser: What It Does & When to Switch
A bloom fertiliser helps plants transition from leafy growth into flowering and fruiting stages. Discover when to switch, how bloom nutrients work, and why timing makes a major difference to…Read the story
FertiliserFertiliserWhat is Cal-Mag & When should you use it
Cal-Mag is a calcium and magnesium supplement used to prevent deficiencies, improve plant structure, and support fast growth. Learn what Cal-Mag is, when to use it, and how to apply…Read the story
CitrusCitrusWhy Citrus Trees Struggle to Fruit
Learn why citrus trees fail to flower or hold fruit, the role of NPK balance, potassium, and Cal-Mag, and how proper citrus fertiliser timing improves fruit set.Read the story
LawnsLawnsWhy Iron Is Essential for Deep-Green Lawns
Learn why iron is the key to deep-green lawn colour and how chelated iron in Lawn Grow delivers fast, lasting results for Buffalo, Couch, Kikuyu and Zoysia lawns.Read the story
Flowers & fruitFlowers & fruitNPK for Fruit Trees: For Bigger, Sweeter Harvests
Boost blossoms, fruit set and flavour with a stage-based plan: start balanced, then switch to CompleteGrow 4-18-38 + CaMg from bud to harvest for bigger, sweeter fruit.Read the story
FertiliserFertiliserWhat is NPK 20-20-20 Fertiliser?
NPK 20-20-20 fertiliser is a balanced all-purpose plant food containing equal parts nitrogen, phosphorus, and potassium. Known as the “jack of all trades” fertiliser, it supports leafy growth, strong roots,…Read the story
FertiliserFertiliserOrganic vs NPK Fertilisers: What Works Best?
Discover the key differences between organic and synthetic fertilisers for Australian gardens. Learn why mineral NPK fertilisers from CompleteGrow deliver faster, more reliable results for vegetables, flowers, and lawns.Read the story
Potted plantsPotted plantsTop 5 Reasons Indoor Plants Struggle
Wondering why your indoor plants are wilting, yellowing, or not growing? Discover the 5 most common problems and how to fix them using easy plant care tips trusted by Aussie…Read the story
FertiliserFertiliserHow to Use NPK 20‑20‑20 for Every Plant Stage
Discover how a balanced NPK 20‑20‑20 fertiliser simplifies hydroponic and houseplant care—supporting growth from seedlings to bloom. Learn usage tips & more.Read the story
Potted plantsPotted plantsLiquid Fertilisers for Gardens & Containers
Discover how liquid fertilisers can boost your plant health, speed up growth, and simplify feeding routines. Trusted by Aussie growers. Learn more now.Read the storyYou’ve seen 18 of 30 stories
Load more storiesnot sure what to feed?
Fertilisers 101, in plain English
What N, P and K do, how to read a label, and which feed suits what you grow. Ten minutes that make every other story easier.
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