Stephanotis (madagascar jasmine) will not flower
I have a Stephanotis (madagascar jasmine) that I got to grow from seed. \
It's doing well for the past 10 yrs, except it has never bloomed. What good is a fragrant plant if it won't put out a blossom, even one?
I live in Utah, so it becomes a house plant in the fall/winter/spring.
I have threatened it, talked nicely to it, cut it back severly, pinched out new growth, let it grow as much as it can, used fertilizer, withheld fertilizer, kept it moist, kept it dry, when out doors put it so the 20' of vine is in the sun with the roots of the plant in the shade, placed it so the whole plant is in shade, placed it so the whole plant is in the sun, even beat it with a stick--but it won't put out a flower.
These things are so difficult to start from seed, I hate to just throw it out, especially if there is some simple or even complicated thing to do to get it to bloom, either outdoors or the 9 months it is indoors. --I have an orange tree indoors, that sets wonderful orange blossoms. I have orchids too. But what am I doing wrong with my jasmine?
I've propagated it by cutting after cutting (anybody want cuttings) and still no luck. Changed the soil to acid, neutral, alkaline, sandy, peaty, miracle-gro.
I called the ag. dept. and asked if there were such a thing as only a male stephanotis, or one that doesn't set flowers. They told me, no.
Any ideas as to what to do next?