Garden Tracker – Bumper Crop
If you’re lucky enough to have a space for planting in the ground, this app will allow you to design your garden and then provide watering times, planting depth and other key information for maximum gardening success!
iGrowIt
This is probably the best gardening app I’ve seen for the iPad. It helps you know when to plant, what to plant and even when to eat the fruits of your labor.
Garden Plants Database
This app is for the science-minded, advanced gardener; however, it does offer excellent tips on horticulture and denotes what growing zones most plants would be successful in. A handy reference for any green thumb.