Prepare a tray with a mixture of equal parts soil,peat and perlite. Place the seeds just under the soil surface. Water the seeds until the soil is moist. Keep the seeds at around 86 degrees Fahrenheit during the day for 8 hours and 68 degrees Fahrenheit at night for 16 hours. Mulberry tree prefer full sun and rich soil,but will tolerate part shade and a variety of soils. They are easy to transplant,salt tolerant and perfect for erosion control,not to mention the delicious berries. Some cultivars are wind-resistant and make wonderful windbreaks. Deciduous trees,all three species attain various sizes. White mulberry can grow to 80 feet (24 m.),red mulberry around 70 feet (21 m.) and the smaller black mulberry may get to 30 feet (9m.) in height. Black mulberries can live for hundreds of years,while red mulberry maxes out at 75 years of age. Mulberry trees should be planted in full sun with no less than 15 feet (5 m.) between trees,ideally in warm,well-draining soil such as deep loam. Don t plant them near a sidewalk unless you don t mind the staining or the potential tracking in of squashed berries (of course,if this is a problem for you,there is a fruitless mulberry variety too!). Once the tree has established,there is very little additional mulberry tree care required.