How to Plant a New Tree in October in Colorado

Planting a tree in October is a perfect time in Colorado because the cooler temperatures help reduce transplant shock and give the tree time to establish roots before winter.

Follow this step-by-step guide to ensure successful planting and growth!

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Step-by Step Guide to Planting Your First Tree

1. Select the Right Location

• Sunlight: Choose a spot that provides the amount of sunlight your tree species requires (full sun, partial shade, etc.).

• Soil Drainage: Make sure the soil drains well. Avoid areas where water pools after a rain.

• Spacing: Ensure there is enough space for the tree’s mature size, away from buildings, power lines, or other trees.

2. Prepare the Planting Hole

• Size of the Hole: Dig a hole that is 2–3 times wider than the tree’s root ball but only as deep as the root ball itself. This encourages the roots to spread out and establish quickly.

• Shape of the Hole: The hole should have sloped sides to make it easier for roots to grow outward.

• Amend the Soil (Optional): If the soil is poor, you can mix in compost or organic matter to improve nutrient content and drainage, but don’t overdo it. Native soils are usually best for trees to adjust long-term.

3. Prepare the Tree for Planting

• Bare Root Trees: Soak the roots in water for a few hours before planting.

• Container or Balled Trees: Gently loosen any circling roots from the root ball to prevent them from strangling the tree as it grows.

• Check for Damage: Prune any broken or damaged roots with clean pruning shears.

4. Position the Tree in the Hole

• Tree Depth: Place the tree in the hole so that the top of the root ball is level with or slightly above the surrounding soil. The trunk flare (where the trunk widens at

• the base) should be just visible above ground level.

• Orientation: If the tree has a leaning side or any structural weaknesses, position the stronger side toward the prevailing wind.

5. Backfill the Hole

• Fill Gradually: Backfill the hole with the original soil, packing it gently but firmly to eliminate air pockets. Avoid stepping on the root zone.

• Water While Backfilling: Water the soil as you fill it to help settle it around the roots and provide moisture for the newly planted tree.

6. Water Thoroughly

• First Watering: Give the tree a deep watering immediately after planting, ensuring the root zone is fully saturated.

• Ongoing Watering: Water weekly for the first few months (unless it snows or rains) to help the tree establish strong roots before winter. In winter, water every 3-4 weeks when the ground isn’t frozen.

7. Add Mulch

• Mulch Layer: Apply a 2–4 inch layer of mulch around the base of the tree, extending feet out from the trunk but keeping it 3-4 inches away from the base of the trunk to prevent rot.

• Benefits: Mulch helps retain moisture, regulates soil temperature, and protects the tree from cold temperatures.

8. Consider Staking (Optional)

• When to Stake: If the tree is tall or in a windy location, you may need to stake it to prevent it from tipping over. Use soft, flexible ties and remove stakes after the first year.

• How to Stake: Place two stakes opposite each other and tie the tree loosely, allowing some movement for the trunk to strengthen.

1. Protect from Winter Damage

• Tree Wrap: Wrap the trunk with a breathable tree wrap to protect it from sunscald and extreme temperature changes. Remove the wrap in spring.

• Deer Protection (Optional): If deer are a problem, consider adding a barrier around the tree to protect it from browsing.

10. Post-Planting Care

• Watering: Continue watering deeply and infrequently during dry spells through the fall, winter, and into spring 2026. This is critical to prevent the tree from drying out.

• Monitoring: Keep an eye on the tree for signs of stress, such as wilting or discoloration. Adjust watering and care as needed.