Question

B. You are going on vacation for a month and can’t find anyone to water your plants while you’re gone. You need a device that will give your plants the right amount of water – not too much and not too little.

Answer 1

I came up with 2 but I need one more.

Answer 2

What about a bottle underneath the plant for evaporation? It may have to be hot outside or wherever you are planning to put the plants.