You can propagate Japanese quince by sowing seeds as sown as soon as it is ripe in autumn, in a sheltered position outdoors or in a cold frame. Sow stored seed in february in a greenhouse. Seeds will germinate usually within 6 weeks. Pot up the seedlings into individual pots as soon as they are large enough to handle. If they grow well, the seedling should be large enough to plant out in the summer, but they will benefit if some protection is offered in their first winter. If you are not sure and want to protect them more than plant them out in the late spring of the nest year.
You can also propagate Japanese quince from semi-ripe cuttings of half-ripe wood, in summer, in an open frame or from cuttings of mature wood of the current year’s growth, in mid autumn, in a cold frame. Layering is also possible in autumn – a sure and easy method, but it takes 12 months to succeed.
Fruits can be consumed cooked, even they are very harsh and acid they become fragrant when cooked. Can be used for jams, jellies and as a flavoring with cooked apples.