The Time Frame for Trees to Grow into Lumber or Firewood
When considering planting trees for either lumber or firewood, the time frame can vary significantly depending on the species, local conditions, and specific cultivation practices. In this article, we will explore the growth rates and characteristics of trees suitable for firewood and lumber, providing a comprehensive guide for those planning to cultivate these trees.
Tree Species Suitable for Firewood and Lumber
Choosing the right tree species is crucial for both firewood and lumber. For firewood, some species grow more quickly and can provide larger logs within a shorter timeframe. For lumber, larger and more durable species are preferred. Here are some examples:
Puriri and Totara: New Zealand’s Firewood and Lumber Options
Let’s take a closer look at the growth of Puriri (Vitex lucIDA) and Totara (Podocarpus totara) in New Zealand:
Puriri is an excellent choice for firewood due to its rapid growth and thick trunks. Here in New Zealand, a Puriri forest of 75 trees, spaced at 1.5 meters (5 feet) apart, can be thinned to a 3 meter spacing within ten years. This process involves gradually thinning the trees year by year until they reach a permanent forest of five mature trees. Trees initially planted seven to ten years ago have grown to be six meters high (20 feet) with rapidly thickening trunks, providing substantial logs for firewood.
Totara is a common commercial firewood species but grows more slowly than Puriri. These trees are ideal for both firewood and lumber. In New Zealand, Totara fenceposts have been in use for over a century, often replaced due to their durability. Farmers have replaced old Totara fenceposts with treated pine, but the old Totara posts are incredibly solid and can no longer be hammered into. These old fenceposts make excellent firewood, providing a warm and long-lasting heat source.
Industrial and Colonial Usage of Totara and Puriri
The Totara and Puriri fences from the old colonial days were made from split sections of logs, demonstrating the hardness and durability of these trees. Farmers often replaced these fenceposts, but it is possible to find these old fenceposts as firewood. Freshly dried Puriri and Totara logs, whether young or mature, are excellent firewood, burning hot and providing a strong flame.
Other Firewood Species
In addition to Puriri and Totara, other species like Poplar and Locust can also be considered for firewood. Poplar sprouts grow quickly but produce poor firewood. Locust trees, on the other hand, can grow fairly quickly and reach firewood size from seedlings in approximately 15 years, with faster growth if the roots are already established.
Conclusion
The time frame for trees to grow into usable wood depends on the species, local conditions, and cultivation practices. Puriri and Totara are excellent choices for firewood in New Zealand, with Puriri offering rapid growth and Totara providing durable and long-lasting logs. Other species like Poplar and Locust can also be suitable, although Poplar is not ideal for firewood. By choosing the right species and implementing appropriate cultivation techniques, you can ensure a steady supply of firewood and lumber for your needs.