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.
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Why are the seeds of this species difficult? The seeds may display dormancy, which would have to be overcome before they will germinate.
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 are likely to have physiological dormancy, but may also be physically dormant.