Wrox Plant Moisture Indicator, White/Blue, 1-Pack

Looks like folks need to use some common sense with this product. First this is used to let you know when soil is dry. If you just sit it in the top of the soil you will know when the soil is totally dried out and things are almost to late at that point. You put this at least a half inch into the soil. As it turns lighter blue you need to water. Don't wait till it turns completely white. Don't water directly on the stone or it will get more moisture then the dirt. Just use some common sense and you this product will work fine for smaller containers, such as six or seven inches. In larger containers you will need to use multiple mosture rocks. Frankly, it is just that simple!

Not the best indicator for plants. Turned blue as described. However even after pushing it into the soil 1/4 inch, if someone was inexperienced their plants would easily get root rot. The stones also always become moldy, regardless of watching how water is applied.

The first time we used it it turned white 1 day after they stay blue even if you pour water on them.

I just got these from the mailman ten minutes ago. Open the package & just from handling them the white coating that is over the dark blue plastic is bubbling up & peeling off. It's literally like a cheap, poorly prepped coat of spray paint that is peeling off! Not too impressed thus far especially at $4 each for these plastic rocks! I've placed them in the soil & watered then real good & they turned dark blue immediately. We'll see how they do as the soil dries out here in the next few days & I'll update my review as necessary. Thanks & good luck! Jim UPDATE I've had these for a couple weeks now & let me say this, they,re junk! Especially at this price! If you wait until the blue stone turns white to water your plant you have probably just killed it! I re-potted a couple plants that I had put the wrox in & I forgot to put them back in after I was finished & they laid on my bench for a complete week before they ever turned white! Just feel the soil to tell when to water. Most plants are good to let the top inch or so of soil completely dry out before watering again. Pay attention to your plants & you can tell by looking at the soil if they need water. If you absolutely need a device to help you tell when to water your plants just get a regular moisture meter but the best & safest method is to just use your finger & feel the soil. Good luck with your plants! Jim

Work well but wick brown from the dirt and look filthy

I wasn't sure how well these would work and I have to say I've tested them twice now and they DO WORK. I just look to see the color to know when to add water to my plants.

They did not work very long.

These work great, if they turn green, it is just algea growing on them, soak them in a solution of bleach and water, rinse them off and let dry, and they are good to go again.

Seem to work well. Put them in a couple plants to start off. Does what it says it will. Very pleased.

Ca fait le travail, je sais maintenant le moment ou je dois arroser

I’ve used these for a few weeks and as you can see the colour on them has simply washed off with nothing more than the simple act of watering the plants. They worked for about 2 weeks before the finish came off. Do not buy.

I placed it in my plant as prescribed To do and my plant was very dry but the little stone said it was wet almost lost my plant

I find these helpful as a visual reminder to water my finicky plants. You must bury them I the soil so only the top shows otherwise they are useless and ensure you water over top of it so it turns dark blue. If you do this they are effective.