great For Houseplants & Home-grown Cropsstops Under- & Overwateringbatteries Not Neededuseful For Lawn Care check The Moisture Level Of Your Soil Beds Or Container Soil Quickly & Easily By Placing This Moisture Gage In The Soil & Reading The Meter. Colour-coded You’ll Get A Good Idea If The Soil Is Dry, Moist Or Wet So You Can Act Accordingly & Get Your Plants To Full Health.with Meter-reading Instructions On The Reverse Of Your Pack You’ll Know If The Plants In Your Soil Need Watering Or Not. The Red Zone Shows That Your Soil Is Dry & Perfect For Cacti & Succulents. Simply Mist-spray These Plants Daily. Most Plants Are Happy In Soil That Is Moist (and In The Green Zone). Water If The Soil Is Proving Dry & Leave If The Soil Is Wet.the Only Plants That Will Be Happy In Wet High-moisture Soil (blue Zone) Are Pond Plants & Moisture-loving Plants Like Lilies, Hostas & Willow Trees.useful Tip:we Suggest That You Insert The Probe Into The Soil Root Zone & Wait For 60-90 Seconds. Remove The Soil Moisture Meter & Read The Scale, Taking Action If Necessary. Wipe The Probe Clean & Dry. Keep The Meter Somewhere Cool & Dry When Not In Use. Don’t Keep It In Soil Over An Extended Period Of Time.