5 Free iPhone Gardening Apps

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.

Garden Plot is a free app, but you will need to splash the cash to get the most from it as useful features. Produce data, the plot planner and information on garden bugs, are all additional in-app purchases.
However, without paying out you can access some data on produce, create a handy to-do list and set up the "My garden" section.
This section is comprehensive; you can not only add plants from the set list, but also enter the date they were planted, see the days until harvest, and add notes and photos.

Designed as an aid for "less confident" gardeners, the RHS' free app is a solid resource for anyone looking to start growing his own produce.
While you can purchase more data within the app, there is useful information about 20 common varieties of fruit and veg for free.
The profiles for each plant will help you decide what to grow, based on your own competence and the space you have.
When you do decide, there are sowing and harvesting instructions and info on common problems.
In addition, you can add fruit and veg profiles to the "My garden" section of the app, which offers calendar alerts to remind you what to do, and when.

Organic Gardening magazine's official app, The Planting Planner is a great tool to make sure you are planting varieties at the right time.
Once you've set up a "garden," you can select what you want to grow from the extensive database, and the app then gives you info about how and when to plant seeds.
It also lets you know when to get them outside, as you can set your garden's location. The app also offers weather information, including frost dates, so your poor little seedlings won't get chilled to death.

Finally, this app is the mobile version of the excellent MyGarden.org social networking site.
If you're not a member, you can still access the plant database info, but obviously you'll get the most out of MyGardenApp if you're a full MyGarden member.
Members can add plants to their gardens, follow other gardeners, see activities and make their own to-do lists.