Mexican Sunflower Plants

Mexican Sunflowers/Tithonia

Willia1 added on August 28, 2012 | Answered

My Mexican Sunflowers are about 6-7 feet tall but there are no flowers on them yet. Should I pinch back some of the green sprouts on the sides? Or do I need to just wait? I live in CT.


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Certified GKH Gardening Expert
Answered on August 29, 2012

I would add a phosphorus rich fertilizer, like bone meal, to the soil. Plants frequently fail to bloom due to low phosphorus. This article has more information:

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