Wednesday, April 11, 2018

Why does A. 'Big Apple' Flower?

A. 'Big Apple'  with every shoot budded
A. 'Big Apple' with buds set - April

Why does A. ‘Big Apple’ flower?

Aeschynanthus ‘Big Apple’ is not commonly grown in commercial horticulture.

Strike that --- it’s never seen.

The hybrid ( micranthus x humilis) is very colorful when in flower with red tubular flowers in clusters on an upright plant.  Aeschynanthus is a Genus with many species and hybrids of all sizes and shapes. And we know that flowering is variety specific.

            The one that everyone knows as the Lipstick plant is still sought after with its bright red flowers.

            ‘Big Apple’s flowers are much smaller, but a cluster of them is impressive.

            What makes ‘Big Apple’ flower?

            From our production of ‘Big apple’, I now know the trigger for bud-set and flowering.

            It is a long-day plant.

            We see small buds on every shoot now in April.  So, they were probably starting in March when the day length started to get longer.  We should see open flowers by May and continuous flowering though the Summer.

A day-length sensitive plant has its benefits to a commercial grower.  Vegetative growth and flowering can be programmed --- flowering is not random, it’s predictable.

So here it is.  Propagate in the Fall, pinch and build plant in the Winter.  Get buds in April, flower in May/June----- Guaranteed. 

So, what’s a hobby grower to do?  If it’s a windowsill houseplant, don’t expect flowers in the Winter.  Wait till Spring and Summer.

If you grow under florescent lights, understand that you can manipulate flowering with the number of hours of lights-on.  8-10 hours for growth, then 14-16 hours for setting bud.  I would expect once the buds are set they will open no matter what the day-length is.

A.    ‘Big Apple’ ---- A long-day plant.

Who knew?

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