Succulents look easy, and that's the trap. Most of them die from too much water, not too little, and a huge number are near-identical to a neighbouring species that wants a completely different watering rhythm. A good app solves both problems: it tells you what you're actually holding, then hands you a care schedule that respects how succulents store water. This guide covers what to demand from a succulent app, and how the major ones — Growli, PictureThis, Planta, Greg and Blossom — actually perform.
What succulents actually need (and where apps go wrong)
Get these four things right and most succulents thrive on near-neglect. Get them wrong and they melt.
- Bright, often direct light. Most succulents want several hours of bright, direct sun a day to hold their compact shape and colour. Starved of light they stretch, pale and flop — a condition called etiolation. A windowsill that's fine for a pothos is usually too dim for an Echeveria.
- Gritty, free-draining soil. Succulents evolved in fast-draining, rocky ground. Standard potting mix holds water against the roots and invites rot; a gritty blend (potting mix cut with perlite, pumice or coarse sand) drains in seconds. See our guide to the best soil for succulents for exact ratios.
- Deep but infrequent watering. The soak-and-dry method is the whole game: flood the pot until water runs from the drainage hole, then leave it bone-dry before you water again. Little-and-often sips keep the roots wet and kill the plant. Frequency depends on light, pot size and season, not a fixed weekly slot.
- Restraint. Overwatering is the number-one killer of succulents — waterlogged soil starves the roots of oxygen and they rot. When in doubt, wait. A thirsty succulent recovers in a day; a rotted one usually doesn't.
Where apps fall down is the watering schedule. A generic reminder that pings you every Sunday is exactly the wrong model for a plant that wants to dry out fully first. The apps worth using either adapt to your light and pot or, better, let you ask "should I water this yet?" and reason about your specific plant.
What to look for in a succulent app
- Accurate ID that separates look-alikes. A green rosette could be a pet-safe Echeveria or a toxic Kalanchoe. The app should identify to species, not just "a succulent."
- A watering model that won't overwater. Look for schedules that factor in light, pot size and season — or conversational care you can question — rather than a rigid weekly ping.
- Diagnosis when something goes wrong. Mushy, translucent leaves mean rot; wrinkled ones mean thirst. An app that reads a photo of the problem saves plants.
- Pet-toxicity data. Several popular succulents are toxic to cats and dogs. The app should tie each species to an authority like the ASPCA.
How the leading apps compare for succulents
All five apps below can identify a succulent from a photo. The real differences are ID precision on look-alikes, how they handle watering, and cost.
| App | Succulent ID | Watering guidance | Price | Platforms |
|---|---|---|---|---|
| Growli | Photo ID + leaf/stem diagnosis; conversational follow-ups | Soak-and-dry care plan; ask "water yet?" in chat | Free | iOS & Android |
| PictureThis | Strong ID, large database incl. succulents | Watering reminders (paid tier) | Free trial, then subscription | iOS & Android |
| Planta | Photo ID incl. succulents | Smart schedule using light, pot & local weather | Free tier; Pro subscription | iOS & Android |
| Greg | Photo ID | Community-calibrated adaptive schedule | Free core; paid tier | iOS & Android |
| Blossom | Photo ID incl. succulents | Watering reminders (paid tier) | Free (3 IDs); subscription | iOS & Android |
PictureThis
PictureThis is one of the most accurate identifiers available and handles succulents and cacti well, drawing on a very large species database. The catch is cost and structure: the free tier caps you at a handful of identifications, and care reminders sit behind a subscription after a short free trial that auto-renews. If pure ID accuracy is your only priority, it's a strong tool — just watch the renewal date.
Planta
Planta's strength is its watering engine. Its schedule factors in the plant, pot size, light level and your local weather rather than a fixed interval, which suits succulents better than a blunt weekly reminder. A built-in light meter helps you judge whether a spot is bright enough — genuinely useful, since light is where most indoor succulents fail. The most powerful features, including unlimited ID and disease diagnosis, need the Pro subscription.
Greg
Greg builds watering schedules from community data — how other owners water the same species in similar light and climate — and adapts over time. That crowd-calibrated approach can work nicely for common succulents. Core tracking is free, with a paid tier for extras. It leans more on scheduling than on deep, per-photo diagnosis.
Blossom
Blossom identifies succulents and pulls care tips from The Spruce. The free version is limited (roughly three identifications) with unlimited scans, disease ID and the light meter reserved for premium. It's a capable general plant app rather than a succulent specialist.
Growli
Growli is built around conversation and diagnosis. You photograph a succulent to identify it, then instead of a rigid schedule you get a soak-and-dry care plan you can interrogate — ask "my Echeveria's bottom leaves are mushy, what's wrong?" and it reasons about rot versus thirst from a photo of the leaf or stem. Its ~11,700-species library includes extensive succulents and cacti, care is UK-localized to RHS guidance, and every species carries its ASPCA pet-toxicity status. It's free on both platforms. It isn't the "best at everything" — PictureThis edges it on raw ID database size, and Planta's weather-aware scheduler is excellent — but for a grower who wants honest, don't-overwater care they can ask questions about, plus pet-safety built in, it's the one we reach for. Compare the same tools on raw ID accuracy in our best plant identifier app roundup.
The pet-safety angle succulent growers miss
Succulents are a genuinely mixed bag for pet owners, and the pretty ones are often the dangerous ones. Verified against the ASPCA:
- Toxic to cats and dogs: jade plant (Crassula), kalanchoe (which contains cardiac-acting bufadienolides), aloe vera, and most Euphorbia (crown of thorns and relatives have an irritant sap).
- ASPCA non-toxic: Haworthia, Echeveria, Sempervivum (hen and chicks), and burro's tail (Sedum morganianum).
Because so many rosette succulents look alike, "it's just a little succulent" is not a safety statement. Match the plant to its species, then check the ASPCA plant list — or let an app that carries ASPCA data flag it for you. Browse Growli's pet-safe plant list before you shop, and read the Crassulaceae succulent family hub to see which of the classic rosettes are safe.
The bottom line
For succulents, "best" means an app that identifies look-alikes correctly and then keeps you from loving your plants to death with too much water. PictureThis wins on ID database, Planta on its weather-aware scheduler. Growli's edge is honest, conversational care you can question, photo-based rot-versus-thirst diagnosis, ASPCA pet-safety on every species — and no paywall. When a leaf goes mushy or you're not sure it's time to water, snap a photo and ask.
Related articles
- Best soil for succulents — the gritty, free-draining mix that prevents rot
- Crassulaceae succulent family hub — jade, Echeveria, Sempervivum and their care
- Best plant identifier app — how the same apps compare on ID accuracy
- Pet-safe plants list — ASPCA non-toxic plants for cats and dogs
- Watering guide — how to read thirst versus overwatering across plant types
Reviewed and updated by the Growli editorial team. Toxicity claims here are checked against the ASPCA. For a specific plant, open Growli and ask — or email hello@getgrowli.app.
Frequently asked questions
Is there an app to identify succulents?
Yes — several. Growli, PictureThis, Planta, Greg and Blossom all identify succulents and cacti from a photo. Because so many succulents are near-identical look-alikes, choose one that IDs to species rather than just 'a succulent' and pairs the ID with care. Growli adds photo-based diagnosis and ASPCA pet-toxicity, and it's free on iOS and Android.
How often should I water succulents?
Use the soak-and-dry method rather than a fixed schedule. Flood the pot until water runs from the drainage hole, then let the soil dry out completely before watering again. How long that takes depends on light, pot size and season — often every couple of weeks indoors, less in winter. Overwatering is the top killer, so when unsure, wait.
Are succulents toxic to cats?
Some are. Per the ASPCA, jade plant (Crassula), kalanchoe, aloe vera and most Euphorbia are toxic to cats and dogs. Others — Haworthia, Echeveria, Sempervivum (hen and chicks) and burro's tail (Sedum morganianum) — are ASPCA non-toxic. Since many succulents look alike, identify the species and check the ASPCA list, or an app that carries ASPCA data, before trusting one around a pet.
Why do my succulents keep dying?
Almost always overwatering plus too little light. Succulents store water in their leaves, so wet soil rots the roots — waterlogged mix starves them of oxygen. Mushy, translucent leaves signal rot; wrinkled ones signal thirst. Fix it with gritty free-draining soil, a bright spot with several hours of direct light, and the soak-and-dry watering rhythm.
What soil is best for succulents and cacti?
A gritty, fast-draining mix. Standard potting soil holds too much water against the roots; cut it with perlite, pumice or coarse sand so it drains within seconds. A common starting point is two parts potting mix to one part grit, always in a pot with a drainage hole. This mimics the rocky ground succulents evolved in and is the single best defence against rot.
Does Growli cost anything for succulent care?
No — Growli is free on iOS and Android. You get photo identification, leaf and stem diagnosis, conversational care advice, watering and frost reminders, and ASPCA pet-toxicity data at no cost. Its species library includes extensive succulents and cacti, with care localized to RHS guidance for UK growers.