Return to the Dahlia Forum | Post a Follow-Up

Started Indoors - Transplanted Outside - Not Looking Good

Posted by nancyd 5/Rochester, NY (My Page) on
Wed, Jul 18, 07 at 16:23

Hello. I have some questions on transplanting established dahlias. I can't find much info re how to do this. This is the first year I've tried this. I started my dahlias indoors in April and they were just fantastic. I hardened them off and transplanted them outside in late May (after frost in my area). They are still languishing. One died - the others look spindly, not lush as when I start the tubers directly in the ground. The questions I have are: (1) Is it possible to plant the tubers too deeply? I'm pretty sure I went well past 6 inches because I forgot about the size of the pots I was using. And (2) Should I not have mulched them? Are the tubers languishing because they are planted too deeply? Thank you.

Follow-Up Postings:

RE: Started Indoors - Transplanted Outside - Not Looking Good

I would think the depth of the tuber is the primary reason. If they are to deep the soil won't be warm enough up where you live and to have mulch on top of the soil keeps the warmth of the sun on top of the ground.
I would dig the root balls up and move the tuber to about 3"-4" inches below the surface, remove the mulch until they are growing well and give them some nitrogen to get them growing. Dahlias like the soil to be at least 70 degrees in order to make roots. You can mound dirt around the stem that has been below the ground until it hardens off to the sun.
Another issue with the tubers so deep is drainage when it rains or when you water as they don't like wet feet and that will retard their growth or make them rot.

RE: Started Indoors - Transplanted Outside - Not Looking Good

  • Posted by nancyd 5/Rochester, NY (My Page) on
    Thu, Jul 19, 07 at 8:54

Thank you. I sort of came to the same conclusions, so it's good to hear them confirmed by someone else. The one dahlia that died had a mushy tuber, so that was a sign I did something wrong.

RE: Started Indoors - Transplanted Outside - Not Looking Good

We also transplanted dahlias that were about 3 feet high to another bed and they all are very wilted! Is there a "right" way to transplant healthy plants and keep them healthy?

RE: Started Indoors - Transplanted Outside - Not Looking Good

How long ago did you transplant your dahlias? 3 feet high is a little large, but I've done it before and they nearly always come out of it and within a few weeks look the same as the ones I didn't transplant. Because I grow so many, I have a row of ones I can transplant in case something doesn't grow right in the main garden. My sister transplanted blooming dahlias a few years ago in the heat of summer because of her daughter's wedding.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Dahlia Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here