Can spruce trees be grown in Australia?
This begs the question: Where do spruce trees actually grow?
Colorado blue spruce thrives in sunny areas with well-drained and fertile soil. It can tolerate dry winds and adapts to dry soil. The tree can be grown in USDA plant zones 3 through 7. Colorado blue spruce can be planted in a hole as deep as the rootball and up to two- or three times wider.
Second, which type of spruce tree am I using? First, look at the needles to identify spruce tree species. If the needles are attached to individual branches, and can roll between your fingers easily, it's a tree. Next, examine the cones. They are smooth and thin on spruce trees and easy to bend.
How do spruce trees reproduce, you ask?
Every spruce tree has both male and female cones. Ovules are found in larger female cones. These ovules then develop into egg cells or female gametophytes. reproduction requires that the male gametophytes are able to reproduce through the release of pollen grains from the smaller cones. The pollen is carried by the wind to fertilize the eggs in the female cones.
How long does it take for a spruce to grow?
A Sitka spruce can grow to 160-200 feet in its 500-year lifespan. It will also reach maturity at 60 inches per year. The Norway spruce is second, with an average annual growth rate of 30 inches. It stands between 40-60 feet and has an impressive but manageable height.
- Water recently planted spruce trees regularly.
- Spread organic mulch around the spruce.
- Fertilize spruce trees in late autumn or early spring.
- Watch for signs of pests or disease.
- Cut back the main leader stem, if it is damaged.
- Take 2- to 6-inch cuttings from stems that are firm and slightly flexible but not hard and woody.
- Pinch side shoots from the bottom one-third of each cutting.
- Prepare a 3-inch pot for each cutting.
- Make a planting hole in the center of each pot, using a pencil or similar object.
- Grow blue spruce trees from cuttings in midsummer around early July.
- Combine equal parts peat or coir and medium-grit sand in a bucket.
- Fill 4-inch square pots with the peat mixture.
- Gather 4- to 5-inch-long tip cuttings from the side branches of a young, healthy blue spruce tree.
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