Hi Sam. I plant both Virginia gold and Kentucky burly when they are about a foot high here in Ohio. They will not grow much till the soil is 65 deg. The leaf size is highly dependent on the type of tobacco. The Virginia has about 18” long leaves and the Kentucky have about 12”. They also each have there own when ripe look. Virginia starts to turn yellow and Kentucky tips start to brown. If you want more leaves you can cut the buds off. We save our seed so I leave them on. The neighbors don’t know what it is, because mine are loaded with flowers. The bees love them. The Virginia smells really good when curing and is sticky. They pic is Kentucky about 6ft tall last fall.
The best place to pray for a good crop is at the end of a hoe!