How to Plant Shrubs | Set Them Up For Years of Growth

Planting shrubs the right way comes down to one thing: giving the roots the best possible start in their new home. Get the depth, soil, and watering right at planting time, and the shrub rewards you with years of steady growth. Get it wrong, and you may be replanting next season. The core method is simple—dig wide, plant shallow, water deep, and mulch like it matters.

Digging The Hole: Width Over Depth

The hole shape determines how the roots grow, so this step matters more than most people think. The goal is a wide, shallow basin, not a deep post hole.

• Width: Dig the hole about 1.5 to 3 times wider than the root ball or container. This loosened soil lets roots spread outward easily instead of circling.
• Depth: Match the depth of the root ball, or go slightly shallower—about 1–2 inches less. A hole that is too deep causes the shrub to settle and sink below grade.
• Compacted soil: If the ground is hard, break it up and till the top 8–12 inches before digging. Loosening the sides with a fork also helps roots penetrate beyond the hole.

Clemson’s Home & Garden Information Center recommends digging the hole at least 1.5 times wider than the root ball and 1–2 inches shallower so the top of the root ball sits slightly proud of the surrounding grade. That slight elevation allows for natural settling.

Setting The Shrub At The Right Depth

Depth is the most common mistake when planting shrubs. The top of the root ball should sit level with, or just above, the surrounding soil—never below it.

Before placing the shrub, inspect the roots. The University of Maryland Extension advises removing any dead, diseased, broken, twisted, or excessively long roots at this stage. If the roots are severely circling or matted, tease them apart or score them with a knife so they grow outward instead of girdling the trunk years later.

Gently lower the shrub into the hole, lifting it by the root ball rather than pulling on the stem. When positioned correctly, the root flare—where the trunk meets the roots—should be visible at soil level.

The exception worth knowing: rose shrubs can be planted deeper so the graft union sits below the soil line. Most other shrubs resent deep planting and will struggle.

Backfilling, Watering, And Mulching

Once the shrub sits at the correct height, backfill with the native soil you excavated. Avoid heavy amendments—shrubs establish better in the same soil they will live in. If you have highly sandy or heavy clay soil, mix in some organic matter before backfilling.

Fill the space around the root ball, firming lightly to remove air pockets, but do not pack it tight. Clemson recommends packing the bottom half of the space around the root ball lightly, then filling the top half more gently. Water to settle the soil thoroughly rather than stomping it down.

After planting, water deeply. A very low hose flow left running for 1–2 hours saturates the root ball and surrounding soil better than a quick drench. Continue watering every few days until the shrub establishes, then taper to once weekly for the first season.

Finish with a 2–3 inch layer of organic mulch in a ring around the shrub, keeping it clear of the stem. The Royal Horticultural Society recommends a 4-inch mulch-free gap around the stems—mulch piled against the trunk invites insects and rot.

The Right Time To Plant Shrubs

Timing your planting avoids the stress of extreme heat and drought. The best windows for most shrubs in the US are spring and early fall, when soil temperatures are cool and rainfall is more reliable.

Dormant shrubs can go in the ground as soon as the soil thaws in spring—roughly mid-March through early June across most regions. Deciduous shrubs also plant well from late August through early November. Evergreen shrubs prefer mid-August through early October, or early spring before new growth pushes. Aim for the coolest part of the year, and hold off during heat waves or drought conditions whenever you can.

Once established, the shrubs you planted well will need far less attention. For help picking the right varieties for shaded or partly shaded spots, our roundup of the best shrubs for part sun covers proven performers for those trickier beds.