Vegetable Garden that can be left unattended?

I want to grow a little vegetable garden. I think it will be fulfilling and rewarding. Problem is – I am at home one week and on the road for three every month. Are there any veggies I can grow? Any special products I can buy to help the garden while I’m gone?
Many thanks

(P.S. I live in a tropical climate)

The best fruit/veg which are low maintenance are rhubarb, potatoes, and onions!! You can plant these and pretty much let them look after themselves, you will need to weed around them but etc but they can cope without you for a while a good website i know which may help you is http://www.love-your-home.co.uk I hope this helps!! Its great fun planting fruit/veg especially if you have kids!!!