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First of all, I have to write that I'm new of this forum.I imported some seed from China that aren't available or cultivated in our country.I'm posting here after wasting a lot of time online because I didn't quite understand how stratification is really done. I want to know how I can stratify the following seeds :

Rose seeds (Green and Black Roses)
Paulovina seeds
Sakura seeds
Pinus seeds (Bonsai)
Boston Ivy seeds
Cycas Revolta seeds
Araucria seeds

I'm told that there are two types of stratification, Cold and Hot stratifications, which one should I use for the above mentioned seeds.
Pakistan has are four seasons: a cool, dry winter from December through February; a hot, dry spring from March through May; the summer rainy season, or southwest monsoon period, from June through September; and the retreating monsoon period of October and November.

So Now, I want to know how i can stratify these seeds and what materials should I use for the process in the refrigarator.
Also, if you can recommend a site that can tell me about the growing and planting seasons of these above mentioned seeds because I am confused, thanks to a mixture of confusing websites I visited. I'm not sure about the seasons.


  • Ladybird4Ladybird4 Posts: 36,194

    Most seeds of hardy trees require stratification - i.e. being subject to a period of cold to break their dormancy. Stratification usually takes place in Autumn and can often be quite erratic - some seeds requiring two winters/cold periods to germinate. If you wish to try your fridge then all that is necessary is to place the seeds in some damp peat or compost inside a sealed plastic bag. just keep checking periodically for any signs of growth.Personally I would just wait until autumn and place the seeds in pots in a cold frame and let nature do the stratification. The RHS have excellent tips to help with this topic. I'm never sure if copying and pasting a link is the correct way to enter on this forum but I'll give it a try!

    Cacoethes: An irresistible urge to do something inadvisable
  • nutcutletnutcutlet Posts: 27,158

    If you research where each plant comes from you will get some clues. No tender plant from a hot country will need cold stratification for its seeds. It's about replicating what happens naturally.

    In the sticks near Peterborough
  • fidgetbonesfidgetbones Posts: 16,695

    I found Paulownia seeds do not need stratification. i put them in a warm greenhouse and they grew.

    Roses I would sow and leave outside for a winter, then bring in to warmth in March (herein UK. No idea about Pakistan)

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