Store in a refrigerator at 5☌ (41☏) until required.These seed can be stored in a plastic bag of damp vermiculite, sand, or a mix of moist coir and sand for several months Examples are walnuts, oaks and magnolias. Certain seed must not be allowed to dry out as they cannot then take up water necessary for germination.Excess humidity or warmth can cause seed to deteriorate or die from fungal disease or rotting.Suitable materials include calcium chloride (sold in DIY stores for use in dehumidifiers) or silica gel Place dry seed in labelled paper packets or envelopes in an airtight container with some desiccant to remove excess moisture.Storing is also required if surplus seed has been collected. However, for many species, sowing is best delayed until a more suitable time of the year, such as autumn or spring, so the harvested seed will need to be safely stored until sowing. hellebore) are best sown immediately as their viability reduces with storage. Chaff can harbour moulds, pests and diseases
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