Garden Lite is an awesome free app that's great for quick reference. There are about 750 plant species in the app's database, and you can view photos and read up on the plants you're interested in.
The app covers all the bases you'd need to know: common name, botanical name, description, care info, soil, climate, planting time, bloom time, pests and diseases.
There's also a separate section on pests with about 20 common garden threats, such as weevils and aphids, and advice on both symptons and treatments.
Here at Mashable, our garden grows with some digital assistance. We have previously rounded up 10 great options to help you get more greenery, and now we're topping up that selection for summer 2012 with five fabulous freebies.