Stories should be written using the active voice. The tone should be informative but friendly, intelligent but not intimidating. Write as if you were giving gardening guidance to a friend or family member visiting your backyard. Begin with an arresting lead that clearly establishes a reason for reading on. Give clear directions for planting, fertilizing, harvesting, pruning, etc.
Emphasis is on what's new, rediscovered, or otherwise noteworthy.
These devices must be tested and their usefulness proven.