I imagine it could be done with hydro or dirt. Just depends on how much money you want to spend and/or how much building you want to do.

I'll share a Mcgyver-type idea I've had for a long time, but never got around to trying it out. You could do this with any plastic container that is air tight except for a lid that can be screwed on. You could use a quart or gallon milk jug, a 5 gallon bucket with lid and gasket (I got 2 of these at Fred Meyer, I think), or even a 5 or 10 gallon plastic gasoline can. Heck, how about a 50 gallon drum? Anyway, hang it above your plant and fill it with water/nutrients, poke a very small hole in the bottom directly above your plant (or just to the side of the plant, you don't want water on your leaves with the light close by). You adjust how fast the drip comes out by tightening or loosening the lid. If it is all the way tight, no water will come out if the hole is small enough. You wouldn't have to have it directly above your plant if you want to get a little more involved and put a grommet and 1/4" hose or something in the reservoir, and run the hose to the plant. You could get a valve for the hose too, that could almost completely shut off the flow. This would be easier than trying to figure out the correct drip by using the lid. Obviously you would want to practice this rather than just turning it on and leaving town. You may need to experiment with hole size. Just another invention of mine that I will see in an infomercial 3 years from now.

Alright, enough nonsense. This is really what you came here to see:

Plants Can Survive Your Holiday

Hope that gives you some ideas. Good luck. Better hurry.

PS, you could also get one of those huge plastic buckets they sell at farm stores (25 gal.?) for a reservoir and put a $7 submersible pump in it, with a drip line to your plant. You can have it on 15 minutes and off 15 if you buy a $14 timer, or you can have it off for 2 hours and on for 5 seconds, or any thing else, if you get a $135 timer called a cyclestat. And/or you can get a $1 valve to put on your line which could almost completely shut off the flow from the pump, and/or put a drip emitter on the end of the line which could also almost completely shut off the flow. Just a closing thought or 2.