During my recent visit to Colorado and Wyoming, I noticed an overabundance or use of certain plants. I can speculate on how certain plants become popular in different regions of the country. Recommendations from experts, like extension agents, nurserymen, architects and such can play a large role. Botanical gardens offer views of plants in comparable landscape designs. Views of plants in magazines, newspapers, and even blogs can format our thinking also. I suppose viewing plants in landscapes in your community plays a strong role also, especially plants that succeed....
Well there was one plant which I strongly like, Calamagrostis acutifolia 'Karl Foerster'. I grow it in my own garden (9 plants as a matter of fact). I like this cool season grass as it blooms early in the year, will grow under trees(though not flourish), and has a great vertical growth habit. But...I swear when viewing Colorado/Wyoming landscapes they were everywhere (along with russian sage). I literally got sick of seeing them. There must be a Johnny Foersterseed going around planting these suckers. In commercial as well as residential designs, this grass was in every design.
(Shown in the background at the Cheyenne,Wyoming Botanical Gardens).
I thing back of past gardening trends and abundance of certain plants that were popular in my geographical areas: high school days: railroad ties, phitzer juniper and yucca. college days: Bradford Pear, Crape Myrtle, Boxwood, Procumbens and Blue Rug Juniper. Yaupon Holly multi-trunk tree form, Dwarf Yaupon Holly, Red Oak and Chinese Pistache trees. Recently Atlas Cedar, Deodora Cedar, Japanese Maple 'Bloodgood', Red Barberry, and Crape Myrtle. Can you think of others in your area or times in your life?