Frost heave is caused by the soil freezing and thawing in winter, and it damages plant roots. You can prevent frost heave by planting early and mulching.

CORVALLIS – Adding organic matter is the best way to improve nearly all kinds of soils. If you’re unsure if your soil needs amendments, take note if it dries and cracks in summer, drains slowly or is ...

These dormant trees grow strong roots.

When planting, the hole is key. Dig it at least twice as wide as the existing root ball. The larger, the better. The length of time it takes to get the tree established and growing is directly related ...

Large trees often develop surface roots that can damage sidewalks, mower blades, and tree health. Mulch 2–3 inches deep to cover roots safely and reduce maintenance without harming the tree. Never cut ...

Soils lose moisture quickly during droughts because the molecular interactions that help retain water are not fully understood. Understanding this mechanism can help engineer soils to better preserve ...