What Grass Is This? for iPhoneTake a photo. Know what your lawn needs this week.
Find out your grass type or what's causing brown spots and weeds. Then follow a plan timed to your soil temperature and local weather.
All October the app has a spooky theme and an optional Halloween icon. You can turn the theme off in Settings, then Preferences.
What the app does
Find out what grass you have
Take a close-up of your lawn. You get the grass type, how sure the app is, and what that grass needs this season.
Free: 3 grass IDs a month · Premium: unlimited
See what's behind brown spots and weeds
Photograph the problem. The app names the likely cause, shows what it saw, and lists what to do first. Tap Ask on the result and the lawn assistant opens with your question already written.
Free: 3 weed or problem scans a month · Premium: unlimited
Get a plan for the whole year
Add your ZIP code, lawn size, and how much sun the lawn gets. The app builds a 12-month plan and puts today's job on Home. When rain, frost, or soil temperature changes, the plan moves with it.
Free: your first task · Premium: the full season plan
Keep a lawn journal
Log mows, watering, treatments, notes, and photos as you go. The Lawn Passport adds up your season.
Free
Example account.
Timed to the soil in your yard
The app checks soil temperature where your lawn is. When it crosses one of these lines, your plan opens the job that goes with it.
- Grass
- Tall fescuecool-season grass
- Soil
- 62°F and fallinginside the 50 to 65°F seeding range
- This week
- Overseed thin spotsbefore your first frost
In fall, as soil cools
70°F
Fall pre-emergent opens
For winter weeds such as Poa annua, henbit, and chickweed. The window closes once soil drops below 55°F.
65°F
Fall seeding window
Cool-season seed roots best while soil is 50 to 65°F, and the app tells you when it's too late to seed before your first frost.
In spring, as soil warms
50°F
Spring seeding window
Cool-season grasses germinate from here. A good time to overseed bare patches.
55°F
Pre-emergent window opens
Apply pre-emergent in the next 7 to 14 days for crabgrass control.
65°F
Warm-season green-up
Bermuda and zoysia start to wake up. The first mow of the year is close.
In spring, as soil warms50, 55, 65°F
50°F
Spring seeding window
Cool-season grasses germinate from here. A good time to overseed bare patches.
55°F
Pre-emergent window opens
Apply pre-emergent in the next 7 to 14 days for crabgrass control.
65°F
Warm-season green-up
Bermuda and zoysia start to wake up. The first mow of the year is close.
Check it without opening the app
Lock Screen
Home Screen widget
Apple Watch
Examples from October.
Start free. Upgrade for the full plan.
| Feature | Free | Premium |
|---|---|---|
| Grass IDs | 3 a month | Unlimited |
| Weed and problem scans | 3 a month | Unlimited |
| Lawn plan | Your first task | Full season plan |
| Weather-aware alerts | Not included | Included |
| Lawn assistant | 10 messages a month | Up to 100 messages a day |
| Lawn setup, calculators, and journal | Included | Included |
Premium, annual plan
14 days free
Then $47.99 a year, about $0.92 a week.
The free trial is for new subscribers on the annual plan. Cancel at least 24 hours before it ends and you won't be charged. The app also has a weekly plan, which has no free trial.
Prefer to pay on the web? Premium is $43.19/year there. Buying direct skips the app store fee, so we pass it back to you. Premium bought here also unlocks the iPhone app on the same account.
