Properly storing and handling seed

  1. Prefer to sow your seeds as soon as possible upon receipt of. Many species are best stored sown in the ground

  2. Store seed for the shortest time only. While stored, seed is still physiologically active and therefore uses energy!

  3. Seed quality can be diminished over time and it is hard to predict viability of an open unused seed package after four or five months

  4. Do not expose seed to direct sunlight

  5. Do not keep seeds in the greenhouse or even at room temperatures. Temperatures over 35°C (95°F) for an extended time will cause damage

  6. Keep seed at constant temperatures all the time. Raise or drop temperature slowly if necessary for acclimatisation

  7. Seed is stored best in a cool and dry place 2 - 16°C (35 - 60°F) or preferably in the refrigerator at 2 - 3°C (35 - 38°F). Keep seed dry in a paperbag covered with a second plastic bag so that it will not pick up moisture while in refrigeration. Periodically monitor condition of the seed

  8. Do not freeze seed at any time! Dangerous! Freezing seed can kill the seed by bursting the cell membranes!

  9. Seed of waterplants like Lysichiton should not be dried at all. If it is not possible to sow right away store moist mixed with Sphagnum or peat, and check frequently if moist enough, or if seed starts to become moldy

  10. Seeds which have a high oil or fat content, (like Hypericum) do not store well. Sow as soon as possible

  11. Always label seedbags carefully!

  12. If you have stored seed for a longer period of time do a germ test yourself before sowing a large number of trays. Use Petri dishes with filter paper and put 25 - 50 seed to germinate and keep moist and check daily


Jelitto · Seeds of more than 3700 different species and varieties


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