Native Plants
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Wednesday - August 13, 2014
From: Houston, TX
Region: Southwest
Topic: Seeds and Seeding, Herbs/Forbs
Title: Flowering ofPluchea odorata in Houston, TX
Answered by: Jimmy Mills
QUESTION:
I sprouted Pluchea odorata seeds this spring, but the plants seem too small to bloom this year. Although your website characterizes this plant as an annual, do you think it will survive the Houston winter and come on next year as a biennial? Thank you, Mr. Smarty PlantsANSWER:
Lets begin by using our Botanical Glossary to check out some terms.
Annual
A species that grows from seed, flowers, fruits and dies within one year's time. See also, Winter Annual.
Winter annual
An annual species that arises from seed in the summer or fall of one calendar year and completes its life cycle in the spring or summer of the following calendar year. E.g. Texas Bluebonnet, Lupinus texensis.
Biennial
A plant that takes two years to complete the flowering cycle. Typically it grows vegetatively the first year and flowers and fruits during the second year before dying.
In this case, your Pluchea odorata (Sweetscent) may be acting as a winter annual if it survives the winter.
This is a bit confusing, but here are a couple of links that can help you understand the interesting lives of flowers:
http://assoc.garden.org/courseweb/course2/week2/page4.htm
http://www.proflowers.com/blog/annual-perennial-biennial-flowers
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