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I received Giant and Red sequoia seeds a few weeks ago (never used those before) and the producer indicates on package to leave those soak 24 hours in water, drain and leave seeds 20 days in the fridge. is this process correct ? (as I read in prior post "I've germinated seeds for 6 WEEKS" (not 20 days in a fridge).... is using a fridge useful , then ? Or was such longer germination about seeds already in soil ?

also, what kind of container size and height should be used, small ones, each seed in an individual hole ? ( like as using an egg plastic package as "holes")

would it be useful to disperse all seeds f.i. in a flat 40 x 40 x 4 cm container, and once the plants are coming out, and each produce a set of leaves, transplant those fragile stuff each in a black plastic bag, and if so, in a relatively high one ( 20 cm height ?) as the other local pines sprouts I used here are extremely fragile and don't like frequent container change. thanks for any answer.

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    Plants need to be sure to growth on the right season (especially if there is cold winter climate). So often seeds are activated just after a cold period (winter), so they will not growth just after they are seeded in summer/fall. About the period: usually nobody really measure it. Experience give us a safe period, two weeks or two months should not matter (and usually we are not in hurry for such plants). [Note: tulips are similar] – Giacomo Catenazzi Apr 13 '18 at 7:01
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Need a little more clarity for a reasonable answer, but you mention two different varieties of Sequoia, Giant and Red. If you mean Sequoia sempervirens (Coast Redwood sequoia) and Sequoiadendron giganteum (Giant sequoia) then the germination procedures are slightly different, so I hope you know which seeds are which.

Both need cold stratification to germinate, which is why you're told to put them in the fridge, but it's usual to put Giant Sequoia seeds in a bag in damp perlite in the fridge, then sow them into your seed trays or pots afterwards. Redwood sequoia seeds are sown into their trays or pots, then given the cold treatment, but I wouldn't have thought anyone would want a tray of soil or a lot of pots full of soil in their fridge...sowing in fall removes the problem, because the trays of soil can be left outside over winter to get their cold stratification.

More information and instructions here http://homeguides.sfgate.com/grow-sequoias-seeds-46311.html

  • about stratification : should the drained seeds be placed then on a flat surface, and covered with perlite f.i., in the fridge , to be "stratified" aka covered ? but also "damped", f.i. with a watered tissue ? – zappymax Apr 14 '18 at 19:31
  • and are Sequoia trees supporting an altitude of 2400 m above sea level ? – zappymax Apr 14 '18 at 19:32
  • planting would be "tried" first in a mountain on the verge of the Mexico City valley (no downtown), in / near the volcanoes zone, eventually at higher altitude (huge local pines are easily growing there) – zappymax Apr 14 '18 at 19:46
  • and are the bags for fridge refrigeration necessary to avoid the fridge's dehydratation impact on seeds ? suppose so... – zappymax Apr 14 '18 at 19:48
  • just stick the giant sequoi seeds in a plastic bag, add perlite, mix 'em up, dampen the perlite, close the bag and leave them in the fridge for the right length of time. Check periodically to make sure the contents are still damp but not soaking and going mouldy. Then remove, extract the seeds and sow them. They don't germinate in the fridge - that's just preparing them to germinate, they'll do that once they're sown. – Bamboo Apr 14 '18 at 21:41

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