In the world of tablets, there are great products and there are cheap products, but very few great, cheap products. Fortunately, for those of you unwilling to shell out $500 for an Apple iPad 2, and wary of buying a piece of junk, Amazon's $199 Kindle Fire tablet should be at the top of your wish list.
Deep rooted plants such as tomatoes, zucchini, corn, and perennial fruits and vegetables, do best in planters at least 22 inches tall, or shorter if the ground below is usable.
For example, some of a tomato plant's roots may go down 4 feet, but most of the roots are no deeper than 2 feet, so the tomato will grow fine in a 2 foot deep container. Maximum depth of 36+ inches, requires at least 24 inches. We've just finished up infographic pieces on Canada's and the USA's waste.