watering when you're away

I have to go away for a week and I'm getting worried about water retention. (Outdoor in planters that are used to being watered every other day) I've seen the local pro-farmers cover their soil with plastic wrap (with a hole for the stalk of course) to hold moisture down. Ever hear of such a thing for cannabis? Or any suggestions how to maintain moisture over say four days without a drop (I have one volunteer coming once during the week)? I got some peat moss for covering but it will dry in hours. I am an inventor, what do you think of water balloons, made out of a dissolving material (rice paper?) that release their water over a prescribed time...like 48 hours later...?? Anybody have suggestions what to do?

I've already found the answer that started with a suggestion by Beachcomber about spikes that attach to any plastic water bottle with the 1.1" cap. I went with the BPDOD. They were the best price and came in a pack of ten. See; .amazon.com/dp/B07FFPLQFD/ref=sspa_dk_detail_3?_encoding=UTF8&path=%2Fdp%2FB07FFPLQFD%2Fref%3Dsspa_dk_detail_3&useRedirectOnSuccess=1&
I'll use two on each plant attached to 2 liter leftover pop bottles to provide one watering while away. I like the adjustable valve on this model. Hope this helps anyone else who needs to water while away.

rkymtnman said:

http://www.hydrospike.com/hydrospike-hs300/

Click to expand...

Thanks, rkymtnman, these look great too. I like how the size of the reservoir container is unlimited, extending the usefulness for longer periods but even if I moved my water tank as close as possible to the pots, I'd still need a couple hundred feet of hose though to reach everybody.