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Perennial Seed Start Dates

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Note: The dates listed on the chart for recommended transplant out dates are just a guideline. The Spring here can sometimes throw a curveball your way. Perennials started indoors are much more tender than those started outdoors. If the tender plants experience a hard frost they may suffer damage. Ensure to check the weather for the times you are putting your plants outside.

Most plants started indoors need hardening off, even hardy ones. They are used to the controlled conditions indoors and need to be acclimatized to the conditions outdoors.

    Hardening Off:

  • As the weather gets nicer start putting the plants outside during the day and bringing them in at night.
  • After about 2 weeks the plants should be hardened off, start this process about 2 weeks before the plant out times, weather permitting of course.
  • Some young plants are tender to frost and near frost conditions and need to be brought in at night, sometimes this weather will last into June.
Common NameBotanical NameIndoor Start DateGermination TimeTransplant Outside
Bee BalmMonardaearly April2-3 weekslate May-early June
Blanket FlowerGaillardiaearly March2-3 weeksearly June
Blue Fescue GrassFestuca glauca ‘select’
ColumbineAquilegiaearly March3-4 weeksafter last frost
ConeflowerEchinaceamid March2 weeksearly June
DelphiniumDelphiniumearly April1-3 weeksearly June
FoxgloveDigitalis purpureaearly March1-2 weeksearly June
LupinLupinus regalismid March3-4 weeksearly June
MalvaMalvamid-late March2-3 weeksearly June
Poppy (iceland)Papaverearly-mid March2-3 weeksmid May
Poppy (oriental)Papaver orientaleearly-mid March2-4 weekslate May-early June
Shasta DaisyLeucanthemum x superbumearly April2-3 weeksearly June
Wildflower (assorted)seed outside early may1-2 weeksseed outside

Remember this is just a guidline, seeds may take longer to germinate or grow and this can vary based on what kind of conditions each seed is grown in. See us in store and we will do our best to answer all of your questions.

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