Quince (Cydonia oblonga) are fruit-producing trees that are hardy in the USDA Zones 5 to 9. They are indigenous plants to the Near East and Central Asia. Quince trees can grow to 20 to 25 feet tall. They can be grown as ornamental shrubs or as fruit-producing trees. Quince trees produce apple-like fruit that are shaped like pears and are used to make jams and jellies. Plant quince plants in full sun, and provide them with good draining, heavy, rich soil.
Place the quince seeds into a bowl of water to soak for 24 hours.
Remove the seeds from the bowl of water. Place the seeds onto a paper towel. Mist the paper towel with water until it's well dampened down. Put the damp paper towel into a sealable polythene bag. Keep the bag in a 35- to 40-degree F location for about 30 to 60 days. Check on the bag every 4 or 5 days. Mist the paper towel in the bag to keep it moist, not wet.
Remove the bag from its cold storage location after the allotted time. Fill up 4-inch pots with good growing medium. Dampen the growing medium thoroughly, then pack it down well. In the center of each pot, poke two to three 1-inch-deep holes.
Carefully remove the quince seeds from the paper towel. Plant one quince seed per hole in each of the 4-inch pots. Cover up the seeds with about one inch of soil and tamp it down gently. Place the pots into a 2- to 3-inch-deep irrigation tray.
Put the tray containing the pots into a warm, light filled location. Try and provide about 6 to 8 hours of light daily and maintain a temperature of between 55 and 70 degrees F. Add 1 inch of water to the tray often enough to keep the soil in the pots moist. Germination for quince seeds can be lengthy, between 30 and 60 days.
Once seeds emerge, place the pots where they will receive at least 8 to 10 hours of light daily. Keep the seedlings moist, but refrain from over watering. Once the seedlings have grown to a good size, about 3 to 4 inches tall, you can pot them up into larger pots, such as 1 gallon containers.