Keep your Juniper Nana outside in a sunny location. It requires lots of light. Keep soil moist but not soggy. Mist the leaves in the spring and summer once a day. Juniper do best in USDA hardiness zones 4-8 and can survive freezing temperatures. In areas with freezing winters special care is to be taken to cover the juniper from frost or can be left in a covered porch or garage.
If kept indoors, you must slowly acclimate the tree to its new environment and keep it where it gets plenty of light whether under a grow light or a very bright south facing window. It will also require at least 8-9hrs of light, air movement and misting to help with heat systems during winter months. You must pay close attention to its surroundings to get the right schedule for your tree for the first week. Once you have established a schedule your tree will thrive and grow.
Once you see old leaves starting to brown and fall, you can tickle or softly rub the clusters to remove any dead or dry leaves to promote more growth.
Dilute a 20-20-20 chemical fertilizer to half strength biweekly during the spring and summer. Wait a month after root pruning or repotting before fertilizing.
You can leaf prune in the spring and summer by pinching off needles with your fingers. Scissors are not recommended on juniper leaves since any cut needles will brown off. It is best to prune branches when you repot in the winter.