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Difficult seed profiles

These species were identified by participants at Kew's 'Difficult' Seeds Project workshops as showing poor germination during initial testing and/or during re-tests after storage. Low germination may be due to inherent issues such as seed storage behaviour, dormancy or seed longevity, or handling and storage difficulties.

To share information on 'difficult' seeds and send your images to improve our resource, email us at difficultseeds@kew.org.

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Why are the seeds of this species difficult? The seeds may have physiological dormancy, which can be overcome by mimicking the seasonal patterns of the species' native habitat.

Why are the seeds of this species difficult? The seeds may have physiological dormancy, which can be overcome by mimicking the seasonal patterns of the species' native habitat.

Why are the seeds of this species difficult? The seeds may have morphological dormancy, which would have to be overcome before they will germinate.

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Why are the seeds of this species difficult? The seeds present no inherent problems in storage or germination. However, if they have not been properly dried and stored under optimal conditions, storage life and viability will be reduced.
Send us an image of this species
Why are the seeds of this species difficult? The seeds present no inherent problems in storage or germination. However, if they have not been properly dried and stored under optimal conditions, storage life and viability will be reduced.
Why are the seeds of this species difficult? The seeds may have physiological dormancy, which can be overcome by mimicking the seasonal patterns of the species' native habitat.
Why are the seeds of this species difficult? Some species of the Poaceae family can produce a high proportion of empty seeds, which collectors and curators must take account of. The seeds may have physiological dormancy, which can be overcome by mimicking the seasonal patterns of the species' native habitat.
Why are the seeds of this species difficult? The seeds of some sub-species may have physiological dormancy. The seeds are relatively short-lived, so may not remain viable for a long time in storage.

We were not able to find information on all of the species identified as having 'difficult' seeds. If you have any information on the handling, storage or germination of these species, please fill in the form to share information with us and help to overcome these difficulties.

Why are the seeds of this species difficult? Species of the Anacardiaceae family can produce a high proportion of empty seeds, which collectors and curators must take account of. The seeds may have physiological dormancy, which can be overcome by mimicking the seasonal patterns of the species' native habitat.
Why are the seeds of this species difficult? Some species of the Poaceae family can produce a high proportion of empty seeds, which collectors and curators must take account of. The seeds may have physiological dormancy.
Why are the seeds of this species difficult? The seeds of this species could have physical or physiological dormancy. Physical dormancy can be overcome by scarifying the seed coat to allow water uptake and encourage germination. Mimicking the seasonal patterns of the species' native habitat can overcome physiological dormancy.
Why are the seeds of this species difficult? The seeds may have physiological dormancy, which can be overcome by mimicking the seasonal patterns of the species' native habitat.
Why are the seeds of this species difficult? This species has recalcitrant seeds, which have a high critical moisture content and will rapidly lose viability if they are dried. The seeds may have physiological dormancy, which can be overcome by mimicking the seasonal patterns of the species' native habitat.
Why are the seeds of this species difficult? Seeds harvested in the wild may have physical dormancy, which can be overcome by scarifying the seed coat to allow water uptake and encourage germination.
Why are the seeds of this species difficult? The seeds may have physical dormancy, which can be overcome by scarifying the seed coat to allow water uptake and encourage germination.
Why are the seeds of this species difficult? The seeds may have morphophysiological dormancy, which would have to be overcome before they will germinate.
Why are the seeds of this species difficult? Seeds harvested in the wild may have physical dormancy, which can be overcome by scarifying the seed coat to allow water uptake and encourage germination.
Why are the seeds of this species difficult? The seeds present no inherent problems in storage or germination. However, if they have not been properly dried and stored under optimal conditions, storage life and viability will be reduced.

Why are the seeds of this species difficult? The seeds may have physical dormancy, which can be overcome by scarifying the seed coat to allow water uptake and encourage germination.

Showing 101 - 120 of 163 results

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