protection of spring blubs from polar vortex

(Question)

With the arrival of the polar vortex later this week, I wondered if I should cover young iris and daffodil shoots,some of which have recently bloomed. We live in the Scarborough
Bluffs, and I thought to use some downed spruce boughs to arch over the plants. Thanks for your consideration.

(Answer)

 

While freezing temperatures could cause some minor damage to flowers that are in full bloom, the bulb itself is very cold hardy and well protected down in the soil.  Even if there is some wilting post freeze, the bulb should make a full comeback next year.  For a fuller explanation, please see the previous post addressing this issue at http://www.torontomastergardeners.ca/askagardener/protection-of-early-spring-flowers-and-plants-during-freezing-temps/.