Water indicator
Over or under watering is the main cause of death for houseplants. Using an indicator takes the guesswork out of this task
How do they work
A thin layer of gypsum coated onto the backing strip absorbs water which moves up the strip by capillary action. Once damp the gypsum becomes transparent and so the colour changes
How do I use them
Push into the compost until white area just disappears. Within an hour or so it will start working. When the watering can turns yellow - it is time to water that plant.
How long do they last
They last for 6 months before needing replacement
How do I use them on moisture loving plants such as Azaleas
Water the plant as soon as the lowest water drop turns yellow
How do I use them with cacti
Only water when the whole watering can has turned fully yellow
Do the indicators still work if I water from the bottom
As long as you allow the plant to soak up water for an hour with water still left in the saucer, then the when to water indicator will work.