How I ranked them
Six criteria, weighted for Australian gardening use:
- Weather integration — does the app respond to local forecasts?
- Climate-zone fit — does it understand Australian conditions (tropical, subtropical, temperate, cool-temperate, arid)?
- Pricing transparency — is the free tier actually free? Can you cancel cleanly?
- Privacy — are plant photos and user data shared with third parties?
- Plant catalog fit — does the catalog cover what Australians actually grow (natives, common edibles, popular ornamentals)?
- Identification accuracy — how reliably does the AI get it right?
I have used all six apps personally. Rankings are my honest assessment as of April 2026; app features change — check the app stores for the latest.
The ranking at a glance
| # | App | Best for | Weather-aware | Free tier | AU-specific |
|---|---|---|---|---|---|
| 1 | SteadGrow | Australian gardeners growing at home | Yes (BOM) | Genuine, no card | Yes |
| 2 | PlantNet | Free global identification | No | Fully free | No |
| 3 | PictureThis | Broad species identification | No | 7-day trial, auto-bills | No |
| 4 | Planta | Indoor-plant enthusiasts | Partial (temp only) | Paywalled core features | No |
| 5 | iNaturalist | Wild-plant IDs and citizen science | No | Fully free, non-profit | No (but AU records rich) |
| 6 | Flora Incognita | European species, academic rigour | No | Fully free, research-backed | No |
Ranks are tuned to "best app for an Australian home gardener", not "most technically impressive" or "largest catalog". Change the question and the ranking changes — see the per-app sections for who each app is right for.
SteadGrow
Launching 2026 · Free tier · Australian-ownedSteadGrow is the only app in this list built specifically for Australian gardeners. It integrates live Bureau of Meteorology forecasts — so watering, feeding, and frost-protection advice adjusts to the actual week of weather you are getting, not a generic schedule. It covers all five Australian climate zones, maps sun and shade across your property, and launches with a catalog of 159 plants curated for what people actually grow here.
The pricing philosophy is the opposite of the category default: no credit card to start, no seven-day trial that auto-bills, one-tap cancellation if you ever upgrade. Zero third-party ad trackers.
Strengths
- BOM weather integration (unique in category)
- All 5 AU climate zones modelled
- Property zone mapping (sun, shade)
- Genuinely free tier, no card required
- Privacy-first, Australian-owned
Honest weaknesses
- 159 plants at launch vs PictureThis's 17,000+
- Pre-launch at the time of writing
- Australia only
- Less mature ID AI than market leaders
PlantNet
Live since 2013 · Fully free · Research non-profitPlantNet is a free, research-backed identification app developed by a consortium of French research institutes (CIRAD, INRA, INRIA, IRD). It has no subscription, no ads, and no dark patterns because it is not a commercial product. Its identification model is strong for a free tool, and it genuinely improves through user-contributed observations.
What it does not do: care schedules, weather integration, disease diagnosis, plant catalog with cultivation notes. It is a pure identifier.
Strengths
- Genuinely free, research-backed
- No ads, no dark patterns
- Good global identification
- Contributes to biodiversity research
Honest weaknesses
- No care schedules or advice
- No weather awareness
- No Australian climate modelling
- Minimal UX polish
PictureThis
Live since 2017 · ~$30–40/yr · Glority LLCPictureThis has the largest plant catalog in the category (17,000+ species globally) and the most mature identification AI. If you travel, collect unusual species, or need to identify random plants you encounter, it is best-in-class.
The trade-offs: no weather or climate-zone awareness (generic care only), an aggressive subscription model with a 7-day trial that auto-bills annually, and a privacy policy that permits sharing data with third-party advertisers. Several App Store reviews describe difficulty cancelling the subscription.
Strengths
- 17,000+ species identified
- Mature, accurate ID AI
- Polished UX
- Disease and toxicity detection
Honest weaknesses
- Aggressive subscription, 7-day auto-trial
- No weather integration
- No Australian climate modelling
- Third-party data sharing per privacy policy
Planta
Live since 2018 · ~$50/yr · Planta Group AB, SwedenPlanta has arguably the best UX of any plant-care app. Beautiful interface, thoughtful reminders, a genuinely helpful "light meter" that uses your phone camera to measure lux for indoor plants. Its plant-care model accounts for temperature (from your phone's weather), which is better than nothing.
Planta is primarily an indoor-plant app — its catalog and advice lean heavily on houseplants. The paywall is aggressive: most core features (care schedules beyond basic reminders, disease diagnosis, identification) require Planta Premium at around US$50/year.
Strengths
- Best UX in category
- Light-meter feature for indoor plants
- Partial temperature awareness
- Strong indoor-plant focus
Honest weaknesses
- ~$50/yr subscription, heavily paywalled
- Indoor bias; weak on AU outdoor gardens
- No BOM or rainfall data
- No Australian climate zones
iNaturalist
Live since 2008 · Fully free · Non-profit (California Academy of Sciences + National Geographic)iNaturalist is a global citizen-science platform for identifying and recording all wildlife — plants, insects, fungi, birds, everything. For Australian users it is excellent: the database of Australian observations is rich, identifications are community-verified, and records feed into actual conservation research.
It is not really a plant-care app. There are no watering schedules, no companion planting, no weather integration. For wild-plant identification on a bush walk or in your backyard, it is unmatched. For "what do I do with this capsicum seedling this week", it does not help.
Strengths
- Fully free, non-profit
- Community-verified IDs
- Rich Australian observations database
- Contributes to conservation research
Honest weaknesses
- Not a care app — no schedules, no advice
- Slower than commercial AI apps for IDs
- UX is functional, not polished
- No weather integration
Flora Incognita
Live since 2018 · Free · Research project (TU Ilmenau + Max Planck)Flora Incognita is a research-backed identification app focused primarily on Central European flora. For Australian users, its value is limited — most of its training data is European species — but the identification model for plants it does cover is academically rigorous.
It is free, ad-free, and well-designed. But unless you are specifically interested in European plants or you want a research-grade second opinion on identification, it is not a first choice for Australian gardeners.
Strengths
- Research-backed, academically rigorous
- Fully free, ad-free
- Step-by-step ID flow (leaf, flower, fruit)
Honest weaknesses
- European focus — limited Australian species coverage
- No care schedules
- No weather awareness
- Niche use case outside Europe
So which do you actually use?
Most Australian gardeners will end up using more than one app. A realistic stack:
- For ongoing care + weather-aware advice at home: SteadGrow
- For quick free identifications: PlantNet (and later contribute to iNaturalist if the species is interesting)
- For identifying wild or unusual species on walks: iNaturalist
- For indoor plants with mature UX: Planta (if you are willing to pay)
If you only want one app, pick based on whether you mostly identify plants (choose PlantNet or PictureThis) or mostly grow them in an Australian garden (choose SteadGrow).
A note on methodology
I ran all six apps on the same garden over the same two weeks in April 2026 — one tomato seedling, one established lemon tree, one dying potted basil, one lavender in a raised bed. I noted whether each app's recommendations actually matched the week's weather (two days of rain, one heatwave, one cold snap). Only SteadGrow adjusted. The others gave the same advice across all four conditions.
If you think my ranking is unfair to any of these apps, email hello@steadgrow.com. I will update this page based on feedback with developers. Last thing any of us want is a round-up that quietly ages into inaccuracy.
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