Here is the BEST Time to Start Delphinium Seeds in Tennessee (2022 Guide)


Do you want to grow delphinium seeds in Tennessee, but don’t know when to start them?

Starting delphinium seeds is not as easy as it seems.

Here’s why:

  • Delphinium Seeds must be consistently watered, receive at least 8 hours of sunlight a day, & be kept at room temperature of at least 70 degrees Fahrenheit.

So if you don’t consistently water them they won’t germinate. If they aren’t in a room that is at least 70 degrees Fahrenheit they won’t sprout. And if it receives 8 hours of sunlight the plant itself won’t grow.

  • Because Tennessee’s growing season is not long enough, delphinium seeds cannot be sowed outside and should only be started indoors.

Because of this, I’m going to teach you the ideal time to start delphinium seeds indoors in Tennessee:

  • To Learn More About HOW to Grow Delphinium, Check Out This GUIDE!

When to Start Delphinium Seeds Indoors

Depending on the type of delphinium, it takes roughly 14-21 days (2 to 3 weeks) to grow delphinium from seed indoors before you can transplant them into your garden. And it could take 1 year for your delphinium to bloom!

The approximate date of when you should start your delphinium seeds indoors can be found by:

  • Finding the last average frost date HERE
  • And then subtract 14 days from it

You can also find the average last frost date for most major cities in the below chart that I have created:

To help ensure the greatest success of your delphinium seeds germinating you should:

  • Use a heat mat to ensure the gardening pot remains at 70 degrees Fahrenheit
  • Use a grow light to control how much light your delphinium seeds receive
  • Water your seeds with a spray bottle to ensure your seeds are not overwatered

It should also be noted that you will not want to introduce your delphinium plants into your garden until 2 weeks after your last frost or else your plant will potentially die or not bloom

If you want to learn WHEN to start ANY Flower Seed in Tennessee, head over to HERE and just type in the flower you want to grow.




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