regarding a Red Mandevilla

I have my plant in a contaier in the garden facing east and getting the full sun throughout the morning (this year has been dreadful though). This is the 4th year I have had a Mandevilla plant. Each year I have purchased one from a local supplier. This year the flower develops but will not open fully. It remains in an open bud formation. What can I do to encourage the flowers to open fully – could it be a genetic fault with the plant?

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1 Comment To "regarding a Red Mandevilla"

#1 Comment By Downtoearthdigs On 06/08/2015 @ 3:48 pm

Here is a link with great information.
Soil, feeding the plant and the correct light conditions are very important.

https://www.gardeningknowhow.com/ornamental/vines/mandevilla/mandevilla-plant.htm ^[1]

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