4.5 Rated Excellent on Trustpilot
SmartyPlants Monitor
SmartyPlants reads 5 conditions and tells you what your plants need, right on your phone.
Monitors light, temperature, humidity, soil moisture, and nutrients
Choose your colour
Green
Limited Edition
Choose your colour
Green
Limited edition
Choose your bundle
-
Single
Try it out
£39.99
-
SAVE 25%
x3
3-Pack
Starter kit
£99.99
£120.00
(£32.99 each)
SAVE 25%

£149.99
£200.00
SAVE 35%

10-Pack
Best value
£259.99
£400.00
(£25.99 each)
Out of Stock
Single
Try it out
£39.99
-
£99.99
£120.00

£149.99
£200.00
10-Pack
Best value
Choose your bundle
-
Single
Try it out
£39.99
-
SAVE 25%
x3
3-Pack
Starter kit
£99.99
£120.00
(£32.99 each)
SAVE 25%

£149.99
£200.00
SAVE 35%

10-Pack
Best value
£259.99
£400.00
(£25.99 each)
Out of Stock
Single
Single
£39.99
-
£99.99
£120.00

£149.99
£200.00
10-Pack
Best value
In stock, ready to ship
Free Shipping on Orders £50+
2-Year Warranty
Got a deeper pot?
Add these for more accurate readings on deeper pots.
Medium stem extension
For pots 18cm+ deep
£9.99
Large stem extension
For pots 25cm+ deep
£9.99
Medium stem extension
For pots 18cm+ deep
£9.99
Large stem extension
For pots 25cm+ deep
£9.99
What's in the box
Each Monitor comes with everything you need to get started
SmartyPlants monitors
3, 5 or 10
Standard stem (10cm)
Fits most plant pots
Buying a 5-pack? You'll get 5 monitors and 5 standard stems.
Specs
Sensor specs
- Hourly readings, 24/7
- 4 months+ battery life
- Rechargeable battery
- WiFi connectivity
- IP65 rated - it won't be damaged from watering
Sensor size
- Visible above the soil
74mm x 45mm x 14mm
- Full size with stem
152mm x 45mm x 14mm
with included soil probe*
* The standard probe is suitable for all pot sizes. For greater accuracy on deeper pots, try the larger probes.
Measurement accuracy
- Moisture: 1-100%
- Light levels: 0 - 100k Lux
- Temperature: -10 - 60C
- Humidity: 0-100%
- Nutrient levels: 0.3 - 1.6 mS/cm
SmartyPlants App
Free on iOs and Android.
No subscription, ever.
Photo ID
Snap a photo, get an instant species match
Health score
One number for how your plant's doing
Full breakdown
See what's behind the score: light, water, humidity and more.
Smart alerts
Only when something's actually wrong, with exactly what to do
Shipping, Warranty and Returns
Shipping
- Enjoy free shipping on all UK orders
- 48 hour shipping from dispatch
Returns
Hassle free 100-day returns
Warranty
Built with quality, supported by our 2-year product warranty
International shipping (non-UK and NI)
Not inclusive of local import duties and taxes
FAQs
Do I need one for every plant?
You don't need one for every plant. Most people get bundles to cover their trickiest plants first. Plant monitors can be moved between plants, so you can focus monitoring where it matters most at any given time.
How does SmartyPlants compare to other plant monitors?
SmartyPlants is the only plant monitor that's:
- Subscription-free
- Rechargeable,
- Hub-free
- Waterproof (so you never risk damage with an accidental watering).
It is the only monitor that measures all of the Essential Five for plant health: moisture, light, temperature, humidity and nutrients.
We built it around these because they're what proper, convenient plant care actually needs.
Does it work with every plant and home?
Yes. If you've got Wi-Fi, you're good to go - SmartyPlants works with every plant and every home.
SmartyPlants supports all kinds of indoor plants, from low-light ferns to sun-loving succulents. It's designed for houseplants of every shape and style, helping each one find its perfect balance.
Is it waterproof?
Yes. It's rated IP65, so it can take a soaking from your watering can. No need to lift it out when you water.
Are there any surprise subscription costs?
None. No subscription, no paywalls, no catch. Every insight is free, with nothing hidden or limited
How often does it take readings?
Around the clock. SmartyPlants monitors your plants 24/7 and sends fresh data every hour - so you'll spot when the afternoon sun is weaker than you'd expect, or when an overnight temperature drop is quietly stressing your plants.
Want an immediate reading? Just press the button on the monitor for instant results.
How does SmartyPlants measure light differently?
We measure lux like other monitors - but we go further and measure light quality too.
Plants use light for food, and not all light is usable: a lion can't live on salad, and plants can't feed on every light bulb.
We tell you whether your plant can actually turn its light into energy. It could be the hidden reason a plant struggles even in a bright spot.
No other monitor does this.
Is the monitor intrusive?
Not at all. It's small and discreet, with an organic design that sits just a few centimetres above the soil. Made to blend in, not stand out.
How long is the battery life?
Four months plus on a single charge, and it recharges with any USB-C cable.
How quickly does it learn about my plant?
Straight away. The moment it's in the soil, it starts reading moisture, light, temperature, humidity and nutrients, and flags anything that needs attention right away.
Over time it builds a fuller picture of your plant's environment to tailor its insights even more.
Your plant's whole story in one app
A Smarter way to care for your plants.
From identifying your plant to knowing exactly what it needs - all in one place.
5 conditions, not 1
Reads light, temperature, humidity, moisture and nutrients together.
Tailored plant advice
Works with every houseplant
No subscriptions, no paywalls
Built to last
One monitor, every plant
A smarter way to care for your plants.
5 conditions, not 1
Reads light, temperature, humidity, moisture and nutrients together.
Tailored plant advice
Works with every houseplant
No subscription, no paywalls
Built to last
One monitor, every plant
A smarter way to care for your plants.
5 conditions, not 1
Reads light, temperature, humidity, moisture and nutrients together.
Tailored plant advice
Works with every houseplant
No subscription, no paywalls
Built to last
One monitor, every plant
How SmartyPlants compares
Not every plant monitor does the same thing.
Reads the 5 essential conditions
for plant care
Additional Wi-Fi hub required to function
No app subscription or premium tiers
Warranty
2-year Warranty
Budget sensors
Moisture meters
Data sourced directly from product websites. Correct as of July 2026. Always verify specs before purchasing.
Thousands of happy
customers in 50+ countries
Three steps to a thriving plant
All you need is the SmartyPlants monitor, and the free app.
Three steps to a thriving plant
What's in the Box
All you need is the SmartyPlants monitor, and the free app.
Rechargeable via USB-C
SmartyPlants Monitor
Pack of 3, 5, or 10
Standard stem (10cm)
Fits most pots
What's in the Box
All you need is the SmartyPlants monitor, and the free app.
SmartyPlants Monitor
Pack of 3, 5, or 10
Standard stem (10cm)
Fits most plant pots
Rechargeable via USB-C
Hear from Our Happy Customers
100-Day Returns
Real Human Support
2-Year Warranty
100-Day Returns
2-Year Warranty
Real Human Support
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