What size container for Zinnias and Dahlias?

brazenspiderApril 16, 2008

I am trying to grow flowers from seed for the first time. A coworker told me the zinnias I planted aren't suitable for containers. The zinnias I planted are supposed to grow to 30 - 36 " and have 4 - 5" blooms. The dahlias are supposed to grow to 20". Each say they should be placed 18 - 24" apart.

Can these be grown in containers? If so, what size container do I need? What size container would I need for more than one zinnia of this size? Thanks in advance. They are such pretty flowers, I hope I can get them to bloom in containers!

Thank you for reporting this comment. Undo

I grew 3 of the 3' dahlias in a 16" pot. Plants grew fine. You may have an increased risk of fungal problems with the plants growing together like that. I did the same pot size with the 18" varieties as well.

I am debating if I will do the same thing this year or just put one in a smaller pot and set it on it's own.

Did your coworker tell you why s/he believed they weren't suitable for containers?

    Bookmark   April 16, 2008 at 8:10PM
Thank you for reporting this comment. Undo

My coworker did say he hasn't grown Zinnias - but he thought that the root ball would be too big to fit in a reasonable size pot - and that if I put one into a small pot it wouldn't bloom. I'm so glad you didn't have problems with your zinnias!

If you were going to put just 1 zinnia plant (3') in a pot, what size would you pick? I appreciate all of the help - I am totally new to growing flowers.

    Bookmark   April 16, 2008 at 11:23PM
Thank you for reporting this comment. Undo

Hmmmm... good question. That's one of the reasons I often put multiple plants into a larger container, more room for error ;-)

Don't take this as experienced advice as it isn't. This is just what I would try based on having grown the 3 footers in larger containers.

I would say 10" pot would be on the small end of what I would use. Is this plant going to be narrow and tall or more bushy? Top heaviness is something you may want to consider when deciding container size. You don't want something that easily blows over all the time.

    Bookmark   April 17, 2008 at 10:06AM
Thank you for reporting this comment. Undo

I definitely don't want something that will blow over all the time. I think I'll go with 16 inch pots and try those for the zinnias and the dahlias. I have no idea how bushy the plants will get - I don't think I've ever seen zinnias or dahlias (this size anyway) in person. I've tried googling - searching this site, other garden sites, even wikipedia. I'm trying to learn, just not finding the information I'm looking for. Thanks again for your help. All advice (even "it worked once") is very welcome.

    Bookmark   April 17, 2008 at 10:36AM
Sign Up to comment
More Discussions
Dealing with Water-Retentive Soils
Dealing with Water-Retentive Soilscolor>size> A...
tapla (mid-MI z5b-6a)
Potting into Air Pots, root length question
Hello all, My question is, air pots are supposed to...
stickstring (Northern California 8b)
Container gardening
My clivia, 20-30 yr old lives in a pot, maybe 15 gal....
Type of kale... Also, shiny metallic flakes?
Hey, my friend gave me some kale seeds from her plants...
Josie Murray
Coarse Perlite for 5:1:1
Hi all, first off is "coarse" the correct...
© 2015 Houzz Inc. Houzz® The new way to design your home™