Which preposition to use with hydrangeas

beside Occurrences 1%

Back, and well out of the picture, a potted hydrangea beside the Louis Quinze armchair, her hands in silk mitts laid out along the gold-chair sides, her head quavering in a kind of mild palsy, Mrs. Miriam Horowitz, smiling and quivering her state of bewilderment.

on Occurrences 1%

A quiver passed over the boy's face, but his lips set tighter than ever and he pulled away from his uncle's hands and turned, staring out of the window at a rather dusty and bedraggled looking hydrangea on the lawn.

Which preposition to use with  hydrangeas