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Get to know what you grow.

Generic plant advice doesn’t know your window, your weather or what you did last week. Petunia, the plant-care app, does. Log what happens to each plant, and Petunia’s answers start from that record and this week’s forecast where you live.

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Petunia × atkinsiana · AI, in Besler’s manner

A garden petunia, Petunia × atkinsiana, drawn in the manner of an antique engraved botanical plate: a stem with three violet-purple trumpet flowers, two furled buds and soft green leaves, in fine line with a watercolour wash.
Real beta screen, from when the app was called Lilly. Conversation. Question: Where is this plant and what window is it near? Lilly: It lives in your living room near a bright east-facing window. That spot gives it great gentle morning light without the harsh afternoon heat. An earlier answer above it says to skip watering today after a thorough drink.

Real Android beta screen

where does it live? Petunia used my note about the window

Real Android beta screen · From when the app was called Lilly · Example chat · About these screens · Enlarge
Petunia · your plantMonstera deliciosaLiving room, east window

How it works

Answers for your plant, not plants in general.

Add your plant, log what happens, then ask.

  1. Step 01

    Add a plant

    Don’t know its name? Take a few photos, and Petunia suggests a match for you to confirm. Then say where it lives, like a sunny windowsill or a shady balcony.

    Real beta screen, from when the app was called Lilly. Add menu with three choices: Add plant, Track a plant. Identify with camera, Point your camera at a plant. Add space, Set up a growing area.

    Real beta screen, when the app was called LillyEnlarge

  2. Step 02

    Log what happens

    Watered it, fed it or saw a new leaf? Log it on that plant. Petunia reads your notes and care log the next time you ask.

    Real beta screen, from when the app was called Lilly. Personal notes: Near a bright east-facing window. Added just now. Add another note. Lilly can reference these when you chat about this plant.

    Real beta screen, when the app was called LillyEnlarge

  3. Step 03

    Ask about your plant

    Ask why a leaf is turning yellow, or whether it needs water. Petunia answers from that plant’s notes, its care log, where it lives and this week’s weather.

    Real beta screen, from when the app was called Lilly. Ask screen: a context chip that reads About your monstera deliciosa, and the question typed in the message box: Where is this plant and what window is it near?

    Real beta screen, when the app was called LillyEnlarge

One plant’s year

See a year of notes explain a yellow leaf.

Follow one example Monstera from the day it comes home. When a leaf turns yellow in winter, Petunia finds the likely cause in its care log.

Avery and the Monstera are an example. So are the chats, except the last reply, which is adapted from a real answer in the beta. The phone screens are the Android beta’s own, rebuilt from the app’s code.

Skip the story

  1. Act one

    Day one

  2. Mar 18 · Act one · Spring

    Day one

    Avery brings home a Monstera with no label. This example follows its first year in the Petunia app.

    A watercolour-washed engraving of the example Monstera as a single specimen with its roots: a young plant with three leaves, just brought home.
    Rebuilt from the app source code

  3. Mar 18 · Act one · Spring

    What is it?

    Avery takes a few photos of a leaf, and Petunia suggests a likely match: a Monstera.

    The same young Monstera, while it is identified.
    Rebuilt from the app source code

  4. Mar 18 · Act one · Spring

    Where it lives

    Avery tells Petunia where the plant lives: the living room, by an east-facing window.

    The young Monstera in its new spot.
    Rebuilt from the app source code

  5. Mar 19 · Act one · Spring

    How much water?

    On day two, Avery asks Petunia how much to water it.

    The example Monstera settling in, with four leaves.
    Rebuilt from the app source code

    Illustrative chat

    You: I don’t know how much to water this.

    Petunia: Water when the top 2–3 cm of soil feels dry. In your east-facing living room this spring that’s often about once a week, but let the soil decide 💧

  6. Act two

    Summer

  7. Jul 8 · Act two · Summer

    Every watering, logged

    Each time Avery waters, one tap saves it on the plant, with the date.

    The example Monstera through the summer, with four leaves.
    Rebuilt from the app source code

  8. Jul 24 · Act two · Summer

    A new leaf

    Avery saves a photo and a note: new leaf coming, rolled up like a cigar.

    The example Monstera with a pale, rolled new leaf rising from the centre.
    Rebuilt from the app source code

  9. Aug 18 · Act two · Summer

    Why the holes?

    The new leaf opens with holes in it. Avery sends Petunia a photo and asks why.

    The example Monstera with a new lime-green leaf, split and holed, among the older whole leaves.
    Rebuilt from the app source code

    Illustrative chat

    You, with a photo: Why does my leaf have holes?

    Petunia: Those are fenestrations 🌿 Young Monsteras grow whole leaves and start splitting as they mature in good light. Your east window is doing its job.

  10. Act three

    Winter trouble

  11. Sep 20 · Act three · Autumn

    A seasonal note

    Petunia’s seasonal note on Home says growth slows in autumn, so most plants need less water. Avery keeps watering every week.

    The example Monstera at summer’s end: the split leaf has darkened, and a larger split leaf has opened above it.
    Rebuilt from the app source code

  12. Jan 8 · Act three · Winter

    A yellow leaf

    Avery asks why a leaf is turning yellow. Petunia checks the care log for a likely cause.

    The example Monstera with its lowest leaf turning yellow.
    Rebuilt from the app source code

    Illustrative chat

    You, with a photo: Oh no, a leaf is going yellow. What’s going on?

    Petunia: It’s most likely too much water for the season. Your log shows waterings on 22 and 29 December and 5 January, the same rhythm as summer, and in winter light your living room dries far more slowly. The roots sit wet and the oldest, lowest leaf yellows first. Let the top 5 cm dry before the next drink, and once the leaf is fully yellow, cut it close to the stem. If the next new leaf comes in green, you’re back on track 🌱

  13. Feb 12 · Act three · Winter

    Back on track

    Avery cuts off the yellow leaf, waters less often, and logs both.

    The example Monstera with a short cut stub where the yellow leaf was.
    Rebuilt from the app source code

  14. Act four

    A year on

  15. Mar 17 · Act four · Spring

    A year on

    A year after coming home, the Monstera has more split leaves, and a year of notes to look back on.

    The example Monstera a year on: two new, deeply split leaves at the top and an aerial root low on the stem.
    Rebuilt from the app source code

  16. Mar 18 · a year on · Act four · Spring

    Should I water?

    A year ago the answer was “about once a week”. Now Petunia can see that Avery watered it this morning.

    The example Monstera a year on, at its fullest, with deeply split leaves and an aerial root.
    Rebuilt from the app source code

    Illustrative chat

    You: Should I water my plant today?

    Petunia: Not today – you gave it a thorough drink this morning and let it drain 💧 Monsteras like the top few centimetres of soil to dry out between waterings.

    Adapted from a real answer in the Android beta.

The more you log,
the better Petunia knows your plant.

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The Android beta

Keep track of every plant in one place.

Everything here works in the Android beta now.

Before you join

What Petunia can and can’t do

Questions

A few questions.

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Try Petunia with your own plant.

Choose your phone and leave your email. We’ll send you the Android testing link, or one email when the iPhone app is ready.

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