Dahlia Placement

pussgurka added on July 27, 2016 | Answered

I am considering planting dahlia tubers this coming spring and I wonder if my choice of placement is going to be okay. I have a stone wall that has large mature linden and maple trees on one side and the other side is cleared for the planting garden. The amount of light should not be a problem; however, I am concerned about the mat of fine roots. This root mat is just at the surface and is 5-10 cm thick. Under this, there is just soil. Will this root mat interfere with the growth of the dahlias? I am noticing that certain plants will grow without problem and others just don't do well at all. Many thanks for any advice or recommendations!

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Certified GKH Gardening Expert
Answered on July 28, 2016

Dahlias need full sunshine and warm, loamy, well draining soil.
If the soil is compacted with a net of roots it could be a drainage issue.
Ph should be between 6.5 and 7.0, slightly acidic.
You can add a small handful of Bone Meal in each planting hole and work in well before planting.
The soil could be amended with sand or peat moss or even steer manure.


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