Moving Large Pine Trees: Timing and Techniques for Success

When to Move Mature Pine Trees

Transplanting 20-foot pine trees at 6,300 feet elevation in Wyoming requires careful timing and heavy equipment. The short answer: early fall is optimal, but spring works with diligent watering. Because these trees are approaching the size limit for successful transplanting, a tree spade is essential.

Seasonal Considerations

Fall transplanting: Evergreens need at least six weeks before the ground freezes to establish new roots. In Wyoming's climate, this means moving trees by early September at the latest.

Spring transplanting: Evergreens can be planted up to four weeks after deciduous trees leaf out, provided they receive consistent, adequate water throughout the establishment period.

Root Ball Requirements

For any evergreen, preserving a substantial soil ball around the roots is non-negotiable. The root ball dimensions should follow this formula based on trunk diameter:

• Width: 9–12 inches per inch of trunk diameter
• Depth: 6 inches per inch of trunk diameter

Example: A 2-inch diameter trunk requires an 18–24 inch wide, 12-inch deep root ball.

Step-by-Step Transplanting Process

1. Prepare the new hole first – twice the width and depth of the root ball.
2. Protect exposed roots immediately with moist burlap, newspaper, or polyethylene sheeting to prevent desiccation from wind and sun.
3. Plant at the same depth – the top of the root ball should match the surrounding ground level.
4. Backfill with quality topsoil and apply no more than 3 inches of mulch, keeping it away from the trunk.
5. Water deeply – 1 inch of water per week (use a pan under the sprinkler to measure).

Equipment Note

For trees this size, a mechanical tree spade is strongly recommended. Vermeer tree spade dealers can be located here.