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Compiled from peer-reviewed research, USDA documentation,
and direct scientific observation across the 48 contiguous states.
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§ 010 · Chapter One
What we share, what we do not, and what we will never do.
Data goes to outside services only when needed to deliver the product. The recipients:
Identification gets more accurate with a location hint, but you decide how precise.
No ads in the app. No ads in any future version. No sponsored placements, no affiliate links, no paid species in identification results, no paid ranking. Permanent.
Three guarantees apply to any subscription or credit-pack price change:
Subscription revenue and credit-pack purchases pay for identification API costs, hosting, infrastructure, and the team's time. No venture capital. No equity investment. No outside money with strategic input attached. Growth stays slower than a VC-backed competitor. Decisions stay with the team and with the people using the product.
§ 020 · Chapter Two
Every change to the app since the proof copy started shipping.
A log of your garden, a bed you can plant, and what to sow this month
A garden calendar, light you can measure, and Dig for balconies
Identify insects, and photos for thousands more plants
Food gardens, gallon watering, and the right pest photos
Photos checked before they post
Watering that anticipates rain
Insects in the library
Better reference photos
Steadier match confidence
Cut flowers in the catalog
Care detail for named varieties
Community + treatment tracking
Native-range maps live, visitor vocabulary set
Species interaction graph
USDA PLANTS depth + bigger catalog
Launch
Every claim in this manual has a source. The ones we reference most, and the peer-reviewed backbone.
Vegetable Planting Chart — Circular 963.
Soil Temperature Conditions for Vegetable Seed Germination (ANR-1061).
Kattge et al. (2020). Global Change Biology 26:119–188.
Clade-level photosynthetic-pathway determinations (Gilman, Crayn, Silvera, Holtum).
Home Gardening.
Handbook for Vegetable Growers, 5th ed. (Maynard & Hochmuth, 2007).
Botany and Planting (CV123).
GardenNotes #731: Herb Gardening.
Soil Temperature and Seed Germination.
Salsify in the Garden.
Fennel in the Garden.
Fava Beans in the Garden.
Celery and Celeriac in the Garden.
Soybean Planting Decisions.
Growing Tomatillos and Ground Cherries.
Pigeon Pea.
Chickpea Production.
Lentil Production.
The CAM Lineages of Planet Earth (2023).
Winged Bean (Technical Note).
Photosynthetic responses of greenhouse ornamentals to interaction of irradiance, carbon dioxide concentration, and temperature.
JASHS 147(2): 82–94
Daily light integral: a research review and high-resolution maps of the United States.
HortScience 53(9): 1250–1257
Assessing the accuracy of free automated plant identification applications.
People and Nature 5(3): 1042–1052
What plant is that? Tests of automated image recognition apps for plant identification.
AoB PLANTS 12(6): plaa052
More than rapid identification — free plant identification apps can also be highly accurate.
People and Nature
An analysis of the accuracy of photo-based plant identification applications on fifty-five tree species.
Arboriculture & Urban Forestry 48(1): 27–43
Costello & Jones (2014). Water use classification of landscape species. UC Cooperative Extension + California DWR.
Global Biodiversity Information Facility (2026). Backbone taxonomy dataset.
INRIA / CIRAD / IRD / INRAE (2026). Citizen-science plant ID.
Kindwise (2026). Plant + disease identification.
(2026). Daily weather forecast API at 0.1° resolution.
PRISM Climate Group (2023). Oregon State University + USDA.
§ 010 · Chapter One
See problems ahead of time and how your choices help local wildlife
Layout
Square foot gardening
A 1 ft grid with one crop in each square, planted at the count the method gives that crop.
Search, drag and drop plants onto the bed. Spacing adjusts itself as you go. Drag a plant to move it, or select it and click the red x to delete. Drag a block's handles to resize it (Shift+Alt+arrows). Sample of 25 crops, the app covers over 170.
We cover 200+ crops and beneficial ornamentals and growing!
Sign up for Early Access
§ 020 · Chapter Two
Planning your next, or first garden has never been easier. Our tool Dig reads your yard one layer at a time, then plans around what it finds.
020.1 · Your lot
Dig pulls the recorded parcel and the footprint of your house, then works out the ground left over to plant.
Parcel: Arkansas GIS Office, Pulaski County (not a survey) · House: Microsoft building footprints
020.2 · Trees
Dig finds each tree on and around your lot, with its height and crown, in a laser survey and aerial photos. If one is gone or the wrong size, fix it and Dig casts the shade again.
Lidar: USGS 3DEP · Tree canopy height: NAIP-CHM, Morford et al. 2026, University of Montana (MIT License)
020.3 · Sun
Dig casts shadows from the house, trees and fences for every daylight hour, and reads the ground under a tree rather than its crown.
Full sun 36%
Full sun = 6+ hrs sun
Part sun 40%
Part sun = 3–6 hrs sun
Shade 24%
Shade = under 3 hrs
USGS 3DEP lidar, NAIP-CHM tree canopy and Microsoft building footprints · shade cast for every daylight hour
020.4 · Temp.
Cold air runs downhill and pools in the low spots, so two corners of one yard can frost days apart.
Frost pocket 57%
Frost pocket = plant ~10 days later
Neutral 28%
Neutral = the area average
Drained rise 5%
Drained rise = plant ~4 days earlier
Warm slope 10%
Warm slope = plant ~10 days earlier
Frost timing is how early or late your spot is likely to frost compared with the surrounding area. Cold air sinks and settles in low ground, so a dip in your yard can frost days sooner than the area average, while a higher rise can frost later.
USGS 3DEP 1 m elevation · Open-Meteo 1991–2020 climate normals
020.5 · Runoff
Dig follows the water downhill to the channels it cuts across your yard. Draw a drain or a retaining wall and it reroutes.
USGS 3DEP 1 m elevation · paved area from USDA NAIP imagery
020.6 · Erosion
Steep ground where runoff concentrates is where soil leaves. Dig marks those spots before you dig a bed into one.
USGS 3DEP slope and flow accumulation
020.7 · Plan
Beds go where the sun, frost and water suit what you want to grow. Move one and the cost and hours follow.
§ 030 · Chapter Three
A field manual is only useful if you can find what you need. Here is the method.
Snap a photo or type a name. Ezina identifies plants, diseases, and insects, and adds what you find to your garden.
Found powdery mildew? It's one of 300+ treatment plans in the app, each with steps to treat it and keep it from coming back.
Watering follows your local rain and temperature, and a treatment repeats until it's done. One notification when a plant needs you. No streaks.
The plant in the camera is garden phlox (Phlox paniculata) with powdery mildew, the same plant treated and scheduled in 030.2 and 030.3. Camera photo: Ruhland, Grenzstr. 3, Hoher Stauden-Phlox, Mehltau-Befall, Sommer, 01 by Wilhelm Zimmerling PAR, CC BY-SA 4.0, via Wikimedia Commons. Cropped and placed in the camera screen.
119 for pests and 186 for diseases and other plant problems, 1,639 steps in all. Every step cites its source. See what we have covered by searching below.
§ 040 · Chapter Four
040.1 Photo
Take or upload up to 4 photos of the same plant from different angles. Each check uses 1 credit.
040.2 Match
Each result is labeled High, Medium or Low match with a percentage, and shows whether the plant is native where you live.
040.3 Add
Confirm the match and choose where it lives. Species in our catalog arrive with care guidance for your zone and weather.
§ 050 · Chapter Five
Take a photo or search by name. Ezina answers for the county you live in.
Ezina finds your county from your location, then checks three records: where USDA has found the plant growing wild, the national register of invasive species, and your state's regulated-plant list.
Not ready for the app? The free native checker on our site gives the same answer, and suggests natives to plant in place of anything your state regulates.
Point the camera at a plant in your yard or at the nursery. The answer comes back with the match.
Type a common or scientific name when the plant isn't in front of you. Compare a few before you buy one.
§ 060 · Chapter Six
Early access on iPhone and Android, with limited seats, for gardens in the contiguous United States.
060.1 Diagnose
Photograph a sick leaf or a bug, then follow one of 300+ treatment plans.
060.2 Water
Watering for pots and beds adjusts to your local rain and temperature.
060.3 Plan
See what to plant this month where you live, and where your yard gets sun.
Also in the app: plant ID, light meter, native checker, plant library, garden log, shared care calendar.
See every feature§ 070 · Chapter Seven
Forever price · Limited seats
No strings attached. If we ever sell a lifetime license, you’ll also get the reduced price. Thanks for your support.
Unlimited plants, calendars, treatments, and full usage of Dig. Cancel any time.
Granted on request · Not self-serve
Unlimited plants, calendars, treatments, and full usage of Dig. Cancel any time.
Forever price · Limited seats
No strings attached. If we ever sell a lifetime license, you’ll also get the reduced price. Thanks for your support.
Unlimited plants, calendars, treatments, and full usage of Dig. Cancel any time.
Granted on request · Not self-serve
Unlimited plants, calendars, treatments, and full usage of Dig. Cancel any time.
Guarantee 01
On any price change for subscriptions or credit packs, sent by email and shown in the app.
Guarantee 02
We never auto-renew you onto a new price. You explicitly choose. Otherwise your subscription ends at the period close.
Guarantee 03
Not satisfied? Email support and the refund is processed. We do not ask why.
* This number applies during testing only. The final number for early access members will be adjusted based on evaluated usage.
** Proof of educator/student status is required. Will need to reapply each August (we will notify you at least a month in advance).
§ 080 · Chapter Eight
The ones we hear most often. The Transparency Promise has the full text.
Q.01 · Data sharing
Answer
Ezina shares data with outside services only when delivering the product requires it. Plant.id and Pl@ntNet receive the photos you submit for identification, with an optional location hint, never your name, email, or account ID. Sightengine checks community photos for unsafe content before they publish, through a short-lived private link, and does not use them to train its models. Supabase holds the database, sign-in, and storage under a data-processing agreement. Open-Meteo receives an approximate location, rounded to a weather cell, to build your watering forecast. PostHog receives product analytics and Sentry receives crash reports. RevenueCat manages subscriptions, Firebase Cloud Messaging delivers reminders, Cloudflare serves the website and API, and Apple and Google handle in-app purchases. The full list, with what each one receives, is at getezina.com/transparency. No advertisers, no brokers, no analytics resellers, and no company whose business is targeting users.
Q.02 · Location
Answer
Identification gets more accurate when the service knows roughly where the plant is, but you decide how precise that hint is. Exact device coordinates give the strongest accuracy and are the default if you grant location permission. City-level information is the alternative — identification still works, with a broader candidate list and lower confidence on overlapping species. You can switch at any time in Settings > Privacy > Location precision; the change applies to future requests only.
Q.03 · Ads
Answer
No. Ezina does not run ads in the app and will not in any future version. Sponsored placements, affiliate links, and paid species in identification results or care reminders are all permanently excluded. This commitment is unconditional.
Q.04 · Pricing
Answer
Ezina costs $6.99 a month or $70 a year after a 14-day free trial, and the trial needs no card. Early Access seats, while they last, lock in $4.99 a month or $50 a year for good, and educators and students can get $3 a month or $30 a year on request.
No. Ezina has no free plan. It is free to use while Ezina is in Early Access; after launch, every account starts with a 14-day free trial, then a subscription. When a trial ends you can subscribe or download your data.
Three guarantees apply to any subscription or credit-pack price change: a notice at least 30 calendar days before the new price takes effect, delivered by email and shown in the app; and your explicit opt-in to renew at the new rate — Ezina never auto-renews you onto a new price. If you do nothing during the notice window your subscription simply ends at the close of the current billing period. Credit packs already purchased keep their value regardless.
Q.05 · Funding
Answer
Ezina is funded by the people who use it. Subscription revenue and credit-pack purchases pay for identification API costs, hosting, infrastructure, and the team's time. Ezina does not take venture capital, equity investment, accelerator funding, or any other outside money that comes with strategic input. No outside party has a seat at the table for product decisions.
Q.06 · Retention
Answer
When you delete your account, your personal information is removed from primary storage within 30 days and from backups within 90 days. That covers your profile, contact details, notification logs, and bug reports. At deletion you can choose to leave your plant care data behind in anonymized form, with the link to you permanently severed. That choice is off unless you turn it on. Identification photos are kept as a de-identified copy to improve identification unless you turn that off in Settings → Privacy, which also removes any photos already kept within 30 days.
Q.07 · Export
Answer
Yes. Settings → Export my data builds a single archive with JSON files for your account, plants, observations, watering and fertilization records, identification and notification history, and bug reports, plus your original photos and a README. You can request one export a week. For a partial export or a specific date range, email support and we will handle it within 30 calendar days.
Q.08 · Moderation
Answer
Community photos stay private until an automated moderation service reviews them. Clearly unsafe content is never published, and borderline images go to a human review queue. Anyone can report a post, comment, or profile, and we aim to clear reports within 48 hours. You can block another user at any time, and it takes effect immediately.
Trust only comes with being honest. We will always cite our sources, from treatments to native region mapping. If we don't know something when you ask, we let you know.
The app is quiet when you don't open it. There are no streaks to break, no daily check-in guilt, no notifications designed to push you. Plants grow on their own schedule. So do we.
Independent and self-funded. No venture, no ads, no harvest of your data. Subscription pays for the work, refunds are no-questions, and the roadmap is yours to read.
Who we work with
Kindwise (Plant.id) · Pl@ntNet · GBIF · USDA PLANTS · GloBI · Apple · Google · Supabase
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