mulching again

Not all of us experience a hard frost..while my tender annuals may be 
gone by the end of October, frequently Oregon frosts (at least on the 
balmy west side) are surface only.
I like the idea of up-ending a pot over perennials..that way I know where 
they are next year.
Would we do this after the plant has died back even in areas where there 
is no hard frost?
I would be sort of concerned that this might lengthen the growing season 
of a plant that needs the cool season weather.
I only mention this because of an experience   I had last year.
We replaced several large windows and I kept the old ones to use in a 
cold frame, propping them up along the outside of a deck railing where 
petunias, pansies, perennial grasses and bulbs grew in a raised bed.  We 
did this in early November.
These did not die back all year but stayed green, the bulbs succumbing to 
rot in March.
The grasses did fine, but they never died back entirely.




e*@europa.com
HPSO
Portland,Oregon USA Z8
Sunset Western Gardening Z6
 *Willamette Valley*

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