Here in California, "Mexican evening primrose" is Oenothera speciosa.

Yes.

This will do:
http://en.wikipedia.org/wiki/Oenothera_speciosa


I've actually done them in pots,
a skimpy, mostly flowerless foliage
will last until late summer, and it
appears gone, but the rhizomes survive
and are very vigorous. Even so, I can
mix in some more potting soil, plant another
six weeks of annuals, until the pots go fallow
towards the end of October, or even through
February - when the rhizomes sprout again!

But it's a whole different thing when they're
in the ground, have to fear the rhizomes and
roots go very deep and have drained the soil.

Josh


"Paulo da Costa" wrote in message
...
Jangchub wrote:
If you pull the foliage you will not have flowers for many years
because the plant cannot photosynthesize and make and store enough
energy to flower. I am not sure what a Mexican primrose is. Can you
be more specific? I mean, around here they call everything from
Ruellia to winecups Mexican primroses.

Here in California, "Mexican evening primrose" is Oenothera speciosa.

It does die back, although here in Northern California it's still
blooming. I don't think there's any problem in removing (dead) foliage, it
is part of its natural cycle. I would plant something else in hat area and
wait for it to come back the following year, it may be too much trouble to
try to eliminate it.

Paulo