Though pines and most other conifers are called evergreens, their needles do not stay alive and green forever. Generally, new needles are produced every spring and summer and last for two to four or more years.
So, as the tree grows larger year-by-year, newer needles are always at branch ends and older needles are farther back in the crown. As needles age, they become less efficient at producing food for the tree.
Generally speaking tropical pines hold their needles only a few years at most, temperate pines for several years and high-elevation species the longest; needles of the Great Basin bristlecone pine, which happens to be the longest-living tree known, may persist for as long as a half-century, more than any other conifer.
As discussed above, the form of a pine needle hints at the success pines have in semiarid ecosystems where minimizing water loss is critical for plants.
Pines also tend to prosper in environments that historically burned in wildfire regularly including many of those semiarid settings. Certain species, including jack pines and lodgepole pines, bear a percentage of cones that can only open — and thus spread seed — when exposed to the heat of a wildfire.
Pine needles play a role in this system. Shed needles can make a thick layer of duff on the pinewood floor, and these ignite readily by, for example, lightning. He holds a B. Hi Lisa, those are Agave americana, a herbaceous monocarpic perennial, related to asparagus. Definitely not a conifer. No amount of care will keep it from decaying from this point. Please could you help identify a tree that was chopped down without permission? We would like to get one the same. That's as close as I can get.
Hi David, I was just wondering if you could assist me in finding out what tree this is, it has every tightly controlled cone that grows out of the top part of the branches of the leave or pine needles grown out of extended little branches of the main branch.
Thank you if you can help. Hi Rosemarie, based on this written description, there is no way our panel of experts can make anything more than a poor guess. Hello David, I have started a garden using conifers and have been collecting them from private parties. Can I send you photographs to help identify what I am finding? We'll give it a try. Pick your favorite ACS point of contact from the list at the bottom of this link and attach pictures just don't abuse us, LOL. After all, we're a lowly non-profit, charitable organization.
Please help me identify this miniature tree. Got it a couple years ago as a Xmas tree - have reported twice so far. Thank you! One of my favorite pines is P. It gets a lot of compliments in my garden. Mine has been potted and repotted for 12 years! Have any university or research institute try to genetically modify any of this pines to grow fine in zone 9 or 10?
Here's a thought. I regularly buy container pines this time of year. I care for them outside until two weeks before Christmas. They yes they, sometimes three of them stay in my attached degree F garage for two weeks.
Then into the house for two weeks. Water once a week while in the house. After two weeks, back into the garage for two weeks and then back outside. Come spring, into the ground they go. Great way to enjoy "real" trees and increase the population of your garden. I am also in SE Mi zone 6, and received a few conifers for Christmas yay! I am going to follow your plan, but am curious as to exactly where in your house do you keep them?
I am going to assume a north-facing location? Hi Armanda, Their first exposure to the house is the garage. It is a constant 43F. I place them in my north-facing living room. I lower the furnace setting to 70F. When spring comes, I place them in the garden wherever I like. I have also overwintered my entire container conifers in my garage.
Don't forget to water. I'm stumped. My wife and I have a Japanese garden in our courtyard over in Wenatchee. We have recently been making some substantial changes in tree selections. It's not done casually - the garden is 14 years old - but necessary now that more cultivar choices are available.
We purchased a pine this spring but I lost the tag and my 71 year old brain cannot remember its ID. I can send photos, but can also describe it. The color is bluish. I believe it's a white pine or perhaps a Japanese pine. It is about 14" high and I am sure I selected it for it's slow growth and small size.
Many thanks!! Given that there are probably dwarf blue cultivars that have been named, it's probably not possible to zero-in on a specific cultivar. Thank you for your kind words regarding the website. What a wonderful website!
I found it while trying to identify the most unique conifer I had seen in roanoke va a few weeks ago that I am still stumped on. I am hoping you might be able to at least help me identify the genus. It was a young tree, single stem with a canopy that appeared would become broad. The bark slightly pealed like a chamaecyparis and the foliage was lime green and very similar to chamaecyparis pisifera filifera but definitely was not.
From a distance it looks like a fine, long needled pine but definitely not a pine, foliage is scale and long and slender. I am in awe of this tree and desperately want to add it to my unique conifer collection. Thank you for your help. Hi Danielle, I can't figure out what you're working with from a verbal description.
Please send a picture. Amazing website. I see that people are asking so here goes nothing. I have a pine tree that gave off wavy needle clusters Almost clam like wave pattern which i used in Christmas decorations a lot! Hi Marcel. I have an allergy to "white pine" what Christmas trees do I avoid? I had a serve reaction to a fresh one 2 years ago. Are there varieties I should I avoid or any confir in general? Apply Today. Forest Forensics - Roscommon. Forest Vulnerability E Hint: it's not what you think!
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