Latitude and its effect on bloom times

Michael Mace
Thu, 28 Jul 2011 10:46:06 PDT
Nhu, your "what's blooming" project is already teaching me some interesting
things.  Flowers that Mary Sue and Jane report in bloom now (Bloomeria
crocea, Gladiolus tristis) are long since dormant here, with the last of
their seed pods drying out and cracking open.


Mary Sue's about 200 miles north of me, and Jane is 500 miles.


We've noted before how the Amaryllis belladonna season starts in southern
California and moves north.  It sounds like that also applies to other


It would be really useful to know what exactly triggers the different
growing times.  Maybe temperature?  Day length?  I doubt it's just water,
since I keep watering my pots until the plants tell me that they want to go


It would be helpful if people could post their altitude along with their
location when they say what's blooming.  If temperature is the controlling
factor, gardeners at higher elevations but the same latitude should see
later blooms.



San Jose, CA (min temp 20F / -7C) (about 500 feet / 150m above sea level)

More information about the pbs mailing list