Polianthes and Manfreda crosses--hardiness issues.

Tony Avent tony@plantdelights.com
Tue, 09 Jun 2009 15:34:44 PDT

The only manfreda that I know of which is hardy north of Zone 7b is M. 
virginica, which has a wide range.  I was in southern Minnesota last 
week and saw one that has grown well there for many years.  Of the 
xMangave's,  xM. 'Bloodspot' is the least hardy since A. macroacantha 
was a parent.  Next is xM. 'Macha Mocha', which is a Zone 8 plant, using 
A. celsii.  Our unreleased hybrids used A. salmiana v. ferox x Manfreda 
jalisciana, both solid Zone 7b plants.  I would rate both Polianthes 
tuberosa and P. gemniflora also as Zone 7b plants, so we don't have any 
hybrids yet that will survive north of the Mason-Dixon line.  Jon is 
slighter colder than we are, so he may have found some of his hybrids 
that can take Zone 7a temperatures.  Adding A. polianthifolia to the mix 
is brilliant since it got no damage here this year at 9F.  That being 
said, the work continues.

Tony Avent
Plant Delights Nursery @
Juniper Level Botanic Garden
9241 Sauls Road
Raleigh, North Carolina  27603  USA
Minimum Winter Temps 0-5 F
Maximum Summer Temps 95-105F
USDA Hardiness Zone 7b
email tony@plantdelights.com
website  http://www.plantdelights.com/
phone 919 772-4794
fax  919 772-4752
"I consider every plant hardy until I have killed it myself...at least three times" - Avent


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