As the heat of the summer starts to wane and the cool breeze of autumn begins to hint at its arrival, many gardeners find themselves drawn to the garden center, seeking new additions to their landscapes. However, one common sight that might give pause is a tree with crispy, dry leaves. While it might seem like a sign of distress, it’s important to understand what causes this condition and why a tree with crispy leaves might still be a great purchase.
Why Do Trees Get Crispy Leaves?
In Colorado, our summers can be particularly harsh on trees, especially those that are still in nursery pots. These pots can limit the root system’s access to water, and combined with intense sunlight and high temperatures, it’s no surprise that some trees may develop crispy leaves.
The primary culprit is often water stress. In a pot, even the most diligent watering might not keep up with the tree’s needs during the peak of summer. The roots can only pull from the limited soil available, and if that soil dries out too quickly, the leaves can suffer. However, while crispy leaves may look unattractive, they don’t necessarily indicate a sick tree. In most cases, the tree itself remains healthy and ready to thrive once planted in the ground.
Choosing a Tree in Late Summer
When selecting a tree with crispy leaves, it’s essential to look beyond the foliage. Check the trunk and branches for signs of health. The bark should be firm, without any cracks or peeling. Gently scratch a small area of the bark with your fingernail; if you see green beneath, the tree is alive and well. Also, inspect the roots if possible. Healthy roots are white or light brown and flexible, not mushy or brittle.
Late summer and early autumn are excellent times to plant trees in Colorado. The soil is still warm from the summer, which encourages root growth, but the air temperatures are cooler, reducing the stress on the tree. Additionally, many garden centers offer discounts on their remaining stock, allowing you to purchase high-quality trees at a fraction of the cost.
Watering Needs of Newly-Planted Trees
Watering is the most critical factor in the success of a newly-planted tree. Once your tree is in the ground, it’s essential to keep the root zone consistently moist. Water deeply, ensuring that the moisture reaches the full depth of the root ball and into the surrounding soil. In the first few weeks after planting, you may need to water every few days, depending on the weather.
As the tree establishes, you can gradually reduce the frequency of watering, but continue to water deeply. In Colorado, it’s also a good idea to water your trees during dry spells in winter. Even when the tree is dormant, its roots need moisture to survive.
Tips for Caring for Your New Tree
In addition to proper watering, mulching around the base of the tree can help retain moisture and regulate soil temperature. Apply a 2-3 inch layer of mulch, but keep it a few inches away from the trunk to prevent rot. Pruning is not usually necessary for newly-planted trees unless there are broken or crossing branches. Allow the tree to focus its energy on establishing roots before encouraging new growth.
Advantages of Planting in Early Autumn
Planting in early autumn gives your tree the best chance to establish itself before the ground freezes. The cooler temperatures reduce stress, and the tree can focus on root growth without the pressure of supporting a full canopy of leaves. Plus, the discounts available at this time of year mean you can invest in more plants or upgrade to larger specimens without breaking the bank.
So, don’t let a few crispy leaves deter you. With the right care, a late-summer tree can become a thriving, beautiful addition to your landscape. Take advantage of the seasonal discounts and plant your trees with confidence this autumn!
