• soak seeds 48 hours in a lukewarm water which should be exchanged at least three times during that time • keep the seeds in a moist environment at +27 ... +32 C for three months, then • several weeks at +10 ... +16 C up to the time when roots appear (the end of the first dormancy) and • after the roots are formed, keep the seeds at +4...+5C until leaves start forming (the end of the second dormancy), after which • plant the seeds deeper than wide pots and hope for a success. • Expect the very first seedlings to flower in the third year; most of seedlings should have their first flowers not later than on their fifth year if growing conditions are OK.