Why are some conifers blue? There really are so many different shades of blue within the conifer world. They are covered with a fine, waxy substance that gives the plants foliage a blue hue. And that's just a few selections of Picea pungens (Colorado spruce). There are other wonderfully hardy spruce that can add to the blue pallet of your garden.
What evergreen trees are blue?
What pine trees are blue?
Cedar. Cedars are one of the larger pine trees that can grow blue-colored foliage. There are only four species of cedar trees, all of which are tall and boast large trunks.
Is there a tree that is blue?
There are no trees with blue leaves. The blue spruce and the blue atlas cedar are the two most common trees with leaves that appear bluish-white. Some trees are also coated with tiny hairs, making their green leaves appear blue.
Do conifer trees change color?
Coniferous trees are what you might generally refer to as pine or evergreen trees; they have thin, waxy needles instead of broad leaves. In stark contrast to they're deciduous counterparts, conifers needles don't change colors and aren't shed annually, but only every few years.
Related guide for Why Are Some Conifers Blue?
How do you keep blue spruce blue?
Apply a chelated iron-rich fertilizer if a blue spruce develops a yellow or yellow-green color. A shortage of iron will cause the needles of a blue spruce to lose their blue coloration. The fertilizer will replace the depleted iron and help the needles regain their blue color.
What's a juniper tree look like?
Identifying Common Junipers
Some common junipers have spiny needle-like leaves that grow in whorls of three: The leaves are sharp-pointed and glossy green with a broad white band on the upper side. The adult tree shape is often narrowly columnar. Common juniper bark is red-brown and peels off in thin, vertical strips.
Is Blue Spruce a conifer?
The blue spruce (Picea pungens), also commonly known as green spruce, white spruce, Colorado spruce, or Colorado blue spruce, is a species of spruce tree. It is native to North America, and is found in USDA growing zones 1 through 7. The blue spruce has blue-green colored needles and is a coniferous tree.
How do I identify a blue spruce?
blue spruce Pinaceae Picea pungens Engelm. Leaf: Evergreen needles, 3/4 to 1 1/4 inches long, stiff and very sharp (spine-like), displayed nearly straight out from twig, silvery blue to dark green. Strong acidic taste. Each needle borne on a raised, woody peg (sterigma).
What is the difference between a blue spruce and a Norway spruce?
The main difference between the Blue Spruce and Norway spruce is that the needles of the Blue Spruce are thicker and longer, which makes it more decorative. In addition, the Blue Spruce grows slower than the Norway Spruce and has a more compact size.
What color is conifer?
While most conifers exhibit some shade of green, these hues can change during the season in many cultivars. Some exhibit various patterns of yellow and creamy white variegation in their needles but the new growth, the bark and the cones provide other color interest.
Are blue spruce trees Hardy?
Colorado Blue Spruce Planting Guide
Colorado blue spruce grows best in a sunny location with moist, well-drained, fertile soil. It tolerates dry wind and can adapt to dry soil. The tree is hardy in USDA plant hardiness zones 3 through 7.
How do you keep a blue spruce tree small?
If you just want to shape your dwarf spruce, or if your tree is young and you want to trim it to keep it small, then you can prune with a good amount of success. Taking care not to cut into the dead zone, cut back any branches that extend beyond the tree's conical shape. Remove ½ to 1 inch (up to 2.5 cm.)
How fast does blue spruce grow?
This tree grows at a slow to medium rate, with height increases of anywhere from less than 12" to 24" per year.
Which blue spruce is the bluest?
Picea pungens 'Hoopsii'
Outstanding evergreen tree, generally considered the bluest form. New growth is especially bright blue. Pyramidal form that holds stiff horizontal branches with dense silvery-blue needles.
Are all blue spruces blue?
ANSWER: Not all Picea pungens (blue spruce), the state tree of Colorado and Utah, are blue. While some are quite blue in color, others have a silvery sheen to their coloration, and many native "blue" spruce are just plain fir-tree-green as you have observed.
Why do blue spruce needles fall?
Needle Cast Disease
The Colorado Blue Spruce often loses its rigid needles after wet seasons. The Rhizosphaera fungus, which thrives in the wet conditions, leads to the needle loss as it takes hold of the spruce.
How tall does juniper get?
Height/spread: Depending on the species you choose, junipers can have an upright, spreading, or weeping habit, and can range in size from 6 inches to 130 feet tall and a spread range from 1 to 25 feet.
Can you grow juniper in the UK?
Common juniper is native to the UK, Europe and much of the northern hemisphere. It thrives on chalk lowland, moorland, in rocky areas and old native-pine woodland. It is most often found as a low-growing, spreading shrub or small tree.
Are cedars and junipers the same thing?
Cedars and junipers are both evergreen coniferous trees belonging to the plant order Pinales. Junipers are trees belonging to the genus Juniperus. Some of these trees, despite being junipers, are commonly referred to as cedars, such as Juniperus bermudiana, which is commonly known as the Bermuda cedar.
What is blue spruce used for?
Uses: The Colorado blue spruce is most commonly used for windbreaks throughout the country. The thickness of the trees reduces wind velocities and can reduce soil erosion greatly. The Colorado blue spruce is not used to make lumber because of its knotty wood and weakness compared to other trees used for lumber.
What is killing the blue spruce trees?
Blue spruce trees are susceptible to an infectious needle disease caused by the fungus Rhizosphaera. The disease, referred to as Rhizosphaera needle cast, is the most common problem seen on blue spruce samples that are submitted to the Plant Disease Clinic. In general, trees appear to die from the bottom upward.
How large do blue spruce trees grow?
How tall do blue spruces grow? Ornamental yard trees often reach 60 to 80 feet and 1.5 to three feet in diameter. Ostensibly reliable internet sources vary greatly on listed maximum heights. Some say more than 100 feet.
What does Blue Spruce look like?
Blue spruce, also known as Colorado spruce, is a conical-shaped evergreen tree with stiff horizontal branches and short stiff needles. It is a commonly used tree in Midwest landscapes. In nature the needles are often green, but many specimens produce blue-green needles.
Are there different types of blue spruce?
Colorado Blue Spruce (Picea pungens)
The Colorado blue spruce has blue needles in a range of shades. The Glauca variety is a light blue, and Glauca Pendula is a weeping cultivar. If you want a shorter one, available varieties include Fat Albert, Glauca Globosa, and Glauca Jean's Dilly.
How can you tell if a tree is spruce?
Spruce trees have individual needles that are stiff and pointy with sharp edges. The needles easily roll between your finger tips. Spruce needles are spiny and sharp (think SSS). Cones hang down from the branches.
Is Blue Spruce good for privacy?
Deep in the Rocky Mountains more than 100 years ago, the blue spruce tree was discovered. Fast forward to today, this evergreen beauty has become a classic tree around Christmastime and even an ideal plant for adding privacy to your yard.