Any ways, I thought I would repost what I am using to water the garden.
If you don't have an ice pick handy, you can always use a bottle with a screw on lid. Fill the bottle and after turning it upside down in your planter, unscrew the lid slightly until it is dripping the amount you would like.
I have other garden video's on YouTube search kathy hunt. Please like and subscribe, thank you for watching.