Oenothera
speciosa is halfway between being the best plant I ever planted and the
worst. The Mexican Evening Primrose has all of the tools for self
replication with both aggressive running roots and fertile seeds.
Oenothera speciosa can make a whole hillside turn pink and with a long
blooming period this makes for a huge impact. When Oenothera
speciosa finally looks tired in the late Fall or because I stopped
watering a month before I mow it to the ground. Early in the Spring
it is back and blooming by mid April. The easiest way to contain
Oenothera speciosa is by leaving a wide area around it with no supplemental
water, and maybe it will stay within the prescribed oasis. Oenothera
speciosa is Winter hardy well below anything likely to be seen in
California, it has not had any issue with the mid teens in our garden.
High resolution images
of Oenothera speciosa are available.
