Yes — indoors, clean compost wins every time.
- Best choice: Use Multipurpose Compost (MPC) as a sterile, low-bug medium — feed monthly and repot yearly.
- Avoid: Raw compost or “living” mixes — they invite gnats, mould, and disease indoors.
Full FAQ
Yes — Multipurpose Compost (MPC) is one of the safest and simplest ways to grow healthy indoor plants. It’s clean, consistent, and far less likely to bring uninvited guests into your home.
Indoors, there’s no rain, no predators, and no UV to keep soil bugs in check. Once fungus gnats, mould, or pathogens get established, they stay — which is why sterility really matters inside.
Why MPC Wins Indoors
- Starts clean: Commercial MPCs are heat-treated or pasteurised, so you begin with a pest-free, microbially quiet base that keeps your potting area and home environment clean.
- Stays balanced: The fine, even texture helps roots breathe and grow while avoiding soggy, compacted patches.
- Feeds easily: Most MPCs provide nutrients for 6–8 weeks. After that, just feed monthly with a balanced fertiliser and repot once a year to refresh structure.
What you get is peace of mind — a compost that behaves predictably and helps your plants thrive without surprises.
Why “Living” or “Soil-Building” Mixes Don’t Suit Indoors
It’s tempting to add raw compost or worm castings to “boost life” in your pots, but indoors that can backfire fast.
- Fungus gnat eggs and larvae
- Mould spores
- Soil-borne pathogens that thrive in warm, enclosed spaces
Even a small amount can cause weeks of frustration. Outdoors, nature keeps those organisms in balance — but indoors, they simply multiply.
Best Practice Summary
Indoors, clean compost wins.
Stick with fresh MPC, feed lightly, and repot once a year. Save your “living soil” experiments for the garden or greenhouse — where biology belongs and balance can return naturally.
