Since we are not in the native range of Alnus viridis here at the Lady Bird Johnson Wildflower Center, we don't have hands-on experience propagating it. We can, however, refer you to some good resources. There is an excellent description of the of propagation of green alder from seed on the SaskPower Shand Greenhouse web page. Also, Dr. Michael Dirr, in his book "Manual of Woody Landscape Plants: Their Identification, Ornamental Characteristics, Culture, Propagaion and Uses" (1998, Ball Publishing) calls for 90 days cold stratification for Alnus crispa seeds. To accomplish this you can put the seeds into a plastic bag with vermiculite or sand that is slightly moistened and store in the refrigerator.
Propagation of rain, oxblood, and copper lily bulbs November 30, 2012 - I have Rain Lily, Oxblood Lily, and Copper Lily bulbs out of the ground, that are putting out some green growth. I would like to plant them soon. Is it okay to plant now and in December, or do I hav... view the full question and answer
Planting bluebonnets near pond area April 26, 2008 - We want to scatter bluebonnet seeds on the banks of a pond area in a housing addition. Do we have to do anything special? How do they do it along highways? view the full question and answer
Rooting cuttings in water from Rifle CO July 11, 2012 - Found russian sage lavender stems from cutting. Need to find out if I can root them in water?
I also have found rose cutting; wondering if I can put them in water to root?
I have a western chokecher... view the full question and answer
Duplicate of English holly for Eufaula OK January 03, 2010 - I wish to have a shrub that would duplicate the red berries and foliage of English holly. Tolerance of cultivation is also desired.
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Lilies not blooming from Austin May 03, 2013 - Last December 8, you published a letter in the Statesman that I had written to you regarding Rain Lilies, Oxblood Lilies, and Copper Lilies. The were sprouting in my garage in a bag. You recommended... view the full question and answer