My name is XXXXX XXXXX I am a General Specialist. I will be happy to assist you with this question. I have found a few Automatic Plant Waterers. I will list some links below:
There are instructions that I can locate where you can make your own from a glass coke bottle, and if you would like those instructions, please let me know and I would be happy to post those instructions for you.
I hope this is helpful. Joan