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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? Some seeds may exhibit a sensitivity to desiccation or susceptibility to freezing. 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? 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.

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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 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? Some wild-collected species of the Asteraceae family can produce a high proportion of empty seeds, which collectors and curators must take account of. The seeds may have physiological dormancy. They are relatively short-lived, so may not remain viable for a long time in storage.

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.

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? 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 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 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? 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.

Send us an image of this species

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

Send us an image of this species

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 of some wild-growing sub-species may have physiological dormancy. This can be overcome by mimicking the seasonal patterns of the species' native habitat.

Send us an image of this species

Why are the seeds of this species difficult? The seeds have an uncertain storage behaviour. They may lose viability through drying and cooling. The seeds may also 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 physical dormancy, which can be overcome by scarifying the seed coat to allow water uptake and encourage germination.

Send us an image of this species

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 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? This species has recalcitrant seeds, which have a high critical moisture content and will rapidly lose viability if they are dried.

Send us an image of this species

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.

Showing 81 - 100 of 163 results

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