quarta-feira, 9 de outubro de 2013

Kentucky: Plant of the Week - Blue-stemmed Goldenrod (Solidago caesia)


This is one of the most elegant of all the native goldenrod species. It is a fall flowering species and is at peak flower right now in the woodlands. It is only one of several native goldenrods that has flowers that appear in the axils of the leaves, zig zag goldenrod is the other and it has larger leaves with petioles (stems) whereas the blue-stemmed leaves are sessile. They are both woodland species but flower much more profusely in areas where they get lots of morning sunlight although it can tolerate almost full sunlight. This is a species that can tolerate some clay in the soil and can even be found in rocky soils although like most woodland species, loam soil is the best. This is not an aggressive or weedy species at all and the sometimes greenish-blue leaves can be up to 5" long and 1" wide. Remember, goldenrods have heavy pollen and this species is no exception in that it is pollinated primarily by bees, and it is not wind pollenated so it is not the cause of your allergies or hay fever. If you really want an outstanding show of color, plant this in groups or clusters of 5 or so plants and then use blue woodland aster around it and the show of light blue and yellow is incredible. This plant is not tolerant of deer browsing although it is certainly not a favored food. Finally, this plant makes an excellent cut or dried flower.

Posted by Dr. Thomas Barnes

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