I recommend DripWorks. If you e-mail or fax them a diagram of your garden or deck, they'll recommend a system and sell you everything you need.

I suspect you'll need something like this: a filter and pressure regulator; 1/2" "mainline" tubing to circle the rail or floor of your deck; 1/4" tubing leading from the mainline to each of your planters; one or two emitters for each pot; fittings for the mainline corners; a male hose end and cap; a female hose start and plug; tools and connectors; and some extras. They're very easy to set up once you get the hang of it. I would suggest a timer, too, and a "Y" hose adapter with shutoff valves so that you can attach another hose to the same faucet.

Most lowes carry mister landscaper brand drip supplies, and I believe there is a kit designed for setting up a system for patio pants... May meet your needs, probably worth a look. Just be careful, leaving a garden hose on all day can lead to disaster andan expensive water bill :)

Thanks nygardener and howelbama. I went and had a look today and the kit at Lowe's looks like it will suit my need as long as I upgrade to the 1/2" main tubing and add extra drippers. It looks like that is where they get you with these things. The kits themselves arent expensive but upgrading to make it more practical can run into a little extra money.

Thanks again!