Fall potting of Siberians


From: Jpwflowers@aol.com

We have had good experience wintering over potted siberians - we wait until 
the weather gets quite cold and cover them with pine needles - at least 8 to 
12 inches thick.  Pine needles work well because they do not mat down like 
leaves can.  The mulch is there to limit the extremes of temperature caused 
by cold nights and warmer days.  This can also be limited by placing the pots 
in winter shade.  The ideal situation is to wait until the pots freeze, cover 
them, and have them in a spot which will not unfreeze until spring.  To 
protect against voles and chipmunks  we use moth balls underneath the mulch 
and place 4 inch X 2 foot PVC pipes around  the area with mouse bait placed 
in the center of the tube.  

We are also careful to use fast draining soil mix for any potted siberians.  
Though they like to be moist they do not like to be soggy and most soilless 
mixes do not have adequate drainage.  We add granite grit to pro-mix, though 
you can also use coarse sand.

Marty Schafer Zone 5

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