Garden Plants Growing Guide provides a database on 75 popular flowers, vegetables, and herbs, with detailed information about their care. (Free, Android only)
Gardens functions as “a personal online scrapbook” for your garden or nature walks. Take photos of plants, then label the images and share your finds on social media. (Free, iOS only)
Garden Guide! provides expert advice on vegetable gardening. “Both beginners and advanced gardeners” should find its tips useful. (Free, $2 only)
Fruit Garden is the Garden Guide of fruit growing, providing advice on everything from soil preparation to harvesting. ($2, iOS; $1, Android)
Sprout It is a new Web-based app, partly sponsored by Miracle-Gro, that guides gardeners based on local conditions.