The process of growing persimmons. Getting trees to grow better. How to inhibit algae growth. Where to plant rhubarb. When plants need cold treatment. Keeping critters away from plants and grass. The spring flower show is getting underway at the arboretum. Bringing geraniums back to life. Making a lawn that is best for bees. It is time to trim maple trees. Learn more from horticulturalist Mary Meyer at extension.umn.edu.