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Clarification on hardy annuals vs. annuals ZONE 5/6

16 years ago

I have gone back and researched the seeds I have ordered so far from cheapseeds and valueseeds. I want to make sure I thoroughly understand what I can sow during the dead of winter and what needs to wait until March/April. Please confirm or contradict my current understanding. I guess I want to know when others in my zone would typically sow these seeds.

The following appear to be perennial in my Zone 5/6, which I understand I could sow anytime in late December/Jan/Feb:

Delphinium Pacific Hybrid Mix

Echinacea purpurea Magnus

Musk Mallow pirouette

Malva Brave Heart

Butterfly Bush

Chicory

Pansy Swiss Giants

Hibiscus moscheuto Disco Belle Mix

Indian Spring Hollyhocks

And half-hardy annuals (according to the plant descriptions)which I am unsure whether they are earlier sown or require later sown:

Morning Glory heavenly blue

Marigold Solan

And hardy annuals, which I would understand can be sown in Dec/Jan/Feb here:

Five Spot

Morning Glory dwarf ensign mix

Morning Glory light blue flash

Love-in-a-mist

And Biennial - sow in Dec/Jan/Feb?:

Foxglove Excelsior Hybrid Mix

The rest did not specify if they were or were not hardy annuals so I assume they are "regular" annuals and would do better sown in March/April:

Black Eyed Susan vine

Painted Daisy

Zinnia Red Spider

Petunia super cascade

Rose Mallow

Gloriosa Daisy

Please futher confirm my understanding that a hardy annual is one that seeds and seedlings can withstand frosts but will die after flowering, while regular annuals cannot take frost and will die after flowering. Am I correct in thinking of a biennial as a two-year perennial?

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