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'Culture of the Shrubby Penstemons: excerpt' - by Bennett, Ralph
The only thing that has been reported so far as a serious concern in the growing of Dasanthera, even in the favored sections of the country, is what some people believe to be a fungous disease. Branches may wilt and die within a short time. Large parts of plants may die. This was reported in 1953 from the area near Seattle, which is a very rainy region in spring, with fluctuating weather condit ....- to download, Link Here

'Culture of the Shrubby Penstemons' - by Bennet, Ralph
The species in Dasanthera inhabit the slopes of the mountains along the Pacific Coast from southern California up into Canada, and extend east as far as Glacier Park and the Big Horn Mountains n the northern part of this country. They do not get into the desert regions of the Great Basin in Nevada and Idaho, and they do not extend in the Rockies south of Yellowstone Park. They are always found at ....- to download, Link Here

'CULTIVATION ADAPTATIONS: SCREE, PLAINS PENSTEMONS, SAND BEDS' - by Barr, Claude
Moisture remains in a fifty percent stone chip scree because the chips are a most efficient force in breaking and retarding capillary movement of water. Water in quantity enters the soil by gravitational pull. After it has quit running, capillarity moves a certain percentage downward if the subsoil is dry, or sideways if there is dryer soil next to it, or upward as the upper soil , becomes dryer. ....- to download, Link Here

'Cox Arboretum 2' - by Yingling, George
At Cox all of my pents are grown in gravel mixed with some dirt and leaf mold. The general nature of the soil in this area is neutral to alkaline. We average nearly 40" of rain each year. Those I recall in best bloom were: hirsutus - Most of these were a good purple with some having a hint of pink in the bloom. One plant had over 100 blooming stems. hirsutus pygmaeus - Many self-sown plants ....- to download, Link Here

'Cox Arboretum' - by Yingling, George
Here is a list of Penstemons I had blooming in my garden and at the Cox Arboretum: P. alpinus: One group of four plants grown from seeds labeled alpinus turned out to be something else. They bloomed similar to procerus but were taller than the procerus in another section of the garden. Another plant in the rock garden at Cox was alpinus. While it had thick, heavy stems, it sprawled. The flow ....- to download, Link Here


 

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