More to explore:
Sprout. Turn a milk jug into a watering can
Cheap rain barrel
How Empty Milk Jugs Changed My Garden
milk jug hot house...start seeds
Fun Uses For Old Milk Jugs - 20 Pics
hanging Milk Jug herb garden
I've seen this done with milk jugs as well...
A helpful yet simple DIY for spring gardeners! Especially for little helpers in the garden from a 1/2 gallon milk jug
milk jug planters
winter milk jug seed sowing. Outdoors!
A low-cost, self-watering planter
succulent pots from milk cartons. Must do for southern windows! @Susan Seward