Wisconsin Gardener’s Tips for May 2024

May 1, 2024

Perennials

Start this month by dividing overgrown perennials; this not only helps manage their size and shape but also invigorates the plants, encouraging more robust growth. After division, enrich the soil around both new and existing perennials by adding a healthy layer of compost.

This practice boosts soil fertility, improves drainage, and enhances the overall vitality of your garden. It’s an excellent way to ensure that your perennials continue to bloom abundantly and maintain health throughout the growing season.

Shrubs

May is the perfect time to prune your spring-flowering shrubs right after their blooms have faded. This not only helps to maintain an aesthetically pleasing shape but also promotes healthier, denser growth for the next season.

Additionally, it’s crucial to start a regular inspection routine for pests and diseases; early detection and treatment are key to preventing these issues from damaging your shrubs. Consider an integrated pest management approach that includes mechanical barriers, organic pesticides, and encouraging natural predators.

Trees

Tree care should focus on maintaining structural integrity and overall health. Begin with a thorough inspection, looking for any signs of damage or disease on branches, trunks, and leaves.

Prune away any damaged or diseased limbs to prevent potential hazards and encourage healthier growth. To support their continued growth and resilience, apply a balanced, slow-release fertilizer around the drip line of each tree. This gradual nourishment complements the natural spring growth spurt, ensuring trees remain robust and well-fed.

Lawn

With the active growth phase of grass in spring, regular mowing becomes essential. Ensure your mower blades are sharp to make clean cuts, which help prevent disease from entering the grass blades.

Set your mower to cut no more than a third of the grass blade height at a time to avoid stressing the grass. If your lawn shows signs of compaction, especially in high-traffic areas, aerating the soil can be highly beneficial. Aerating improves oxygen, water, and nutrient flow to the roots, which helps in developing a lush, healthy lawn.

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