Indoor Plant Food Refill

While your plants are actively growing (spring and summer for most), feed fortnightly at the standard 1ml/litre rate. Over the cooler months, growth slows — ease back to a half-strength feed about once a month.

The simple rule: feed when the plant is growing, not by the calendar.

Yes — it works well in passive hydro. Add ½ml with each water change while plants are actively growing.

Five years.

1ml per litre of water.

Yes, its fine to use on your orchids

Yes. It's fine outdoors and on edibles — just give your produce a wash before eating, as you would with anything.

Yes. It carries the three macronutrients plants need most — nitrogen, phosphorus and potassium — plus secondary nutrients (calcium and magnesium), a full set of trace elements (boron, iron, manganese, zinc, copper and molybdenum) and seaweed extract. So your plants aren't left short of anything.

Yes and no. It's the same product, with the same NPK and the same nutrient values. The only variable is the seaweed extract: it's shore-harvested and not from a single fixed source, so depending on the batch and variety, the colour can shift slightly. The feed itself is unchanged.

Stick to 1ml per litre and you've got plenty of margin — it's a gentle, complete feed, not a harsh concentrate. If you do go heavier than intended, water through with plain water and resume at the right rate next time. The only real way to cause trouble is feeding hard and often through winter when the plant isn't growing, which lets unused salts build up in the mix. When in doubt, less.

Sometimes, but it's worth being honest: feed helps a healthy plant do more, but it can't rescue one that's struggling with light, water or mix. If a plant is sitting in the wrong light, staying too wet, or stuck in tired mix, sort that first — then feeding gives it something to actually work with. Get the basics right and a good feed is what turns the corner.

It's a plant fertiliser, so it's not for eating — keep the bottle out of reach and stored sensibly, as you would any garden product. Once it's diluted and watered into the pot, there's nothing unusual to worry about. Just don't go drinking the concentrate.

They do different jobs. Indoor Plant Food is your regular liquid feed — the nutrients a plant draws on as it grows. The Soil & Microbe Booster works on the soil, adding beneficial microbes and structure that help the mix stay alive and hold onto what you feed. Plenty of people use both; if you're starting with one, start with the feed.