Elisabeth C. Miller Library

Gardening Answers Knowledgebase

Search Results for: Cedrus | Search the catalog for: Cedrus

Plant Answer Line Question

Keywords: Prunus padus, Styrax, Laburnum, Davidia, Ribes, Larix, Chamaecyparis, Picea, Tsuga, Cedrus, Fagus, Betula, Flowering trees, Pinus, Ericaceae (Heath family), Conifers

Are there any lists of shrubs/small trees that are best viewed from below, such as Styrax or Halesia?


While there are no lists of shrubs/small trees best viewed from below, there is a list of trees with weeping habits in The Pacific Northwest Gardener's Book of Lists (Ray and Jan McNeilan, 1997). Many genera of conifers - Cedrus (cedar), Chamaecyparis (cypress), Larix (larch), Picea (spruce), Pinus (pine), and Tsuga (hemlock) - have weeping forms, often indicated by a variety name 'Pendula' or 'Pendulum'. There are weeping birches (Betula), beeches (Fagus), and cherries (Prunus), too.

You are correct about Styrax and Halesia. Additionally, I ran across a few individual species that may be of interest to you as I researched this question:
--Davidia involucrata
--Laburnum anagyroides
--flowering currants, Ribes spp.
--flowering cherry trees, particularly Prunus padus
--various plants in the Ericaceae family have bell-shaped flowers that hang on the underside of the stem.

I would add that any tree which has a naturally graceful branching pattern and/or delicately shaped foliage (such as Japanese maples) would be pleasant to view from below, as well as from other angles.

Date 2018-08-23
Link to this record only (permalink)

Plant Answer Line Question

Keywords: Screens, Cedrus

I need a large tree for privacy and would like it to be fast growing here in Seattle. I would not like it to be much more than 15 feet wide at maturity but the height doesn't matter, also evergreen. Would an Incense cedar grow fast?


In addition to Calocedrus decurrens (Incense Cedar), you might also consider Podocarpus or Cryptomeria.

You may want to consult the locally created web pages of Great Plant Picks, and see which evergreen trees they recommend for our area. This is their list of conifers, and here is the information on Incense Cedar.

Incidentally, Great Plant Picks says that Incense Cedar does make a good screening plant. They claim it will mature at 35-40 feet tall in garden conditions (as opposed to in the wild), and about 10 to 12 feet wide, so your original idea of planting this tree sounds like a good one.

Date 2018-08-16
Link to this record only (permalink)

Plant Answer Line Question

Keywords: Cedrus, Trees--Diseases and pests--Washington

What is the disease causing needle drop, and even killing in some cases, Cedrus trees in our area? Is there a fungicide recommended to help control the disease, and if so, what timing is recommended?


I can't be absolutely certain what the cause might be, but taking a look at some Northwest integrated pest management resources could provide ideas on the likely culprits.
Oregon State University's IPM site mentions Kabatina and Sirococcus conigenus. Here is what the print companion to the website (2008 Pacific Northwest Plant Diseases Management Handbook) says about Cedar needle blight:
"The fungi Sirococcus conigenus and Kabatina sp. have been associated with blighted needles of Atlas and Deodara cedars in both Oregon and Washington; however, Sirococcus is found most often. More of a problem in years with prolonged wet, cool springs. Infection is on or adjacent to needle bases on new shoots. The disease cycle is completed in 1 year, although spore dispersal from dead parts may continue (...) 10 months. The fungus overwinters in dead shoots. Conidia are dispersed by splashing water in spring and summer. (...) Temperatures of 60 to 70 F are most favorable for disease development.(...) Cultural control: Remove and destroy blight plant material and debris that is found under trees or caught in limbs. Chemical control: No chemicals are specifically registered for this disease on cedar." (The full information is available in the link above.)

Washington State University in Puyallup has a document indexing plant hosts of various pathogens, and for Cedrus they list Sirococcus species as well as Phomopsis.

There are discussions on the topic of Cedrus blights at University of British Columbia Botanical Garden's online forum which mention tip blight sometimes appearing in tandem with borers or mites.

Date 2018-03-14
Link to this record only (permalink)

Plant Answer Line Question

Keywords: Cedrus, Pollen

This fall, the evergreen tree (needles, sort of bluish in color) in front of my house has been driving me crazy. It's dropping tons of soft, yellowy, pod-like things and when people walk into the house, they track in this yellow pollen and it stains the carpets. First, what kind of tree does this, and second, is it on some kind of cycle? Will it stop dropping these things soon?


Without seeing the tree, my best guess is that it is a type of Cedrus, possibly Cedrus deodara or Cedrus atlantica. Since it is now October, what you are seeing is the shedding of male catkins or pollen cones. This is a seasonal phenomenon, so it will stop soon. Oregon State University's Landscape Plants database has some pictures of the cones in fall. Meanwhile, you might want to have a shoes-off policy inside the house, which should cut down on the invasion of pollen.

Date 2018-10-06
Link to this record only (permalink)

Plant Answer Line Question

Keywords: Cedrus, Timber

Given that the Atlas cedar is a true cedar (as opposed to the Western red cedar), does the wood have any particular aromatic or bug-resistant qualities?


I checked The International Book of Wood (edited by Martyn Bramwell; Emblem, 1979), and here is what it says about Cedrus:
"True cedar is a softwood produced by three species. The cedar of antiquity is the cedar of Lebanon, used in the construction of the royal tombs of the early kings of Egypt and by Solomon in the building of the Temple; the deodar of northern India is almost as famous, and the third species is the Atlas cedar [Cedrus atlantica] of the mountains of Algeria and Morocco. [...] The wood of the three species is similar, pale-brown, with a fairly well-defined growth ring, and characterized by a fragrant smell. It is of medium weight for a softwood, a little heavier than European redwood. Cedar dries readily though with a tendency to distort. It is inclined to be brittle and, generally, is not a strong wood; it works easily and takes a fine finish. It is noted for its resistance to both fungi and termites."

This link from Plants for a Future database mentions its fragrance, as well as its fungus- and insect-repelling qualities:
"An essential oil obtained from the distilled branches is a good antiseptic and fungicide that stimulates the circulatory and respiratory systems and also calms the nerves. [...] An essential oil obtained from the distilled branches is used in perfumery, notably in jasmine-scented soaps. The essential oil also repels insects.[...] Wood - fragrant and durable. It is prized for joinery and veneer and is also used in construction. It is also used for making insect-repellent articles for storing textiles."

Date 2018-03-14
Link to this record only (permalink)

Didn't find an answer to your question? Ask us directly!

Browse keywords

Search Again: