Flowering and fruiting issues



Sometimes plants won't flower, or flower poorly. In other cases, they produce plenty of flowers but fail to set fruit. This page will collect information that might help you figure out the cause of your problem.


News

How do you know if you're old enough (to flower)?

In the case of Alpine Rock Cress, it appears to be a running down of levels of a regulatory RNA molecule. Once it falls below a critical level, the plant can them respond to the cold stimulus required for flowering. Such a mechanism may prevent premature flowering, which would weaken the plant and jeopardize the chances of this perennial surviving to flower again. A similar mechanism appears to be operational in the relative Arabidopsis, but it can be overridden by favorable weather conditions. As an annual, seed set and not longevity is paramount. These findings could help in the research and breeding of other brassicas by reducing the generational times. Source: Flowering at the right age (June 2013)

Older news at bottom of page.

Other Information Online


Why Don't Shrubs Flower (or fruit)? North Carolina State University
Why plants fail to bloom University of Rhode Island
Bulbs That Refuse to Bloom University of Illinois
Why Fruit Trees Fail to Bear New Mexico State University
Why Fruit Trees Fail to Bear University of Illinois Extension
Fruit Set in Fruit Trees An overview of various factors which can affect fruiting. University of Florida
Fruit Tree Chilling Requirements Backyard Gardener column, March 2, 2005. Arizona Cooperative Extension, University of Arizona
What are short day and long day plants? Extension Service Garden Hints, Oregon State University
Light and flowering of bedding plants Michigan State University
Minimize Bedding Plant Production Time to Offset High Fuel Costs Discusses effect of temperature and photoperiod on annual flowers (PDF)
The Myth of Night Light Can street lights and other sources of artificial light affect plants other than poinsettias? Washington State University (PDF)
Blooming Out of Sequence Purdue University
Use of Lighting to Accelerate Crop Timing Michigan State University (PDF)
Pollination Home Page Pollination information
Bee pollination benefits for tropical fruit crops Department of Agriculture Western Australia
Honeybee pollination of fruit tree crops Department of Primary Industries, Victoria
Insect Pollination Of Cultivated Crop Plants including some general information on flowering and fruiting of plants United States Department of Agriculture Agricultural Research Service
Lack of fruitset (Grapes) Michigan State University
Why Water Fruit Trees Department of Primary Industries, Victoria
Deadheading Washington State University Clark County Extension

For additional information on specific plants, check the relevant page.
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