Activity
NASA

Nasa: Climate Kids: Make Exploding Seed Balls!

For Students 2nd - 6th
Try this fun recipe for making and growing wildflowers right in your own garden.
Website
Other

Kitchen Culture Kits, Inc.: Plant Tissue Culture

For Students 9th - 10th
An excellent site for learning about plant tissue culture. Great visuals and easy to understand instructions. Lots of links to other good sources.
Handout
Texas A&M University

Wildflowers in Bloom: Wildflowers

For Students 9th - 10th
Start wildflowers from seed, find out what your hardiness zone is, learn about seed germination and sunlight needs of plants. All this and more.
Primary
Texas A&M University

Easy Gardening. . . Beets [Pdf]

For Students 9th - 10th
Let's you know all about this cool weather crop. Soil Preparation, fertilizing, planting, varieties, insect concerns, harvesting and more. Requires Adobe Reader.
Activity
Colorado State University

Gardening & Horticulture in Denver: Gardening With Children

For Students 3rd - 5th
The section on plant projects for kids has lots of hands-on ideas for studying plant biology. Activities are included for stages from seed germination to growth. Geared more to the younger student.