While most bonsai varieties thrive outdoors, Juniper Bonsais can tolerate indoor conditions if provided with adequate light, temperature, and humidity levels. Yet, it's generally recommended to start growing them outdoors.

Watering a Juniper Bonsai is a delicate balance that requires keeping the soil consistently moist without letting it become waterlogged. During warmer seasons, daily watering might be necessary, with multiple waterings per day during extreme heat. It's crucial that the soil does not completely dry out between waterings. While watering your Juniper Bonsai, it's also important to lightly mist the decorative living moss at the base of the tree. This moss helps retain moisture and benefits from being misted to maintain the right humidity levels around it, preventing it from drying out.

Juniper Bonsais thrive in bright, direct sunlight and should receive a minimum of three to four hours of full sunlight daily with seven or eight hours being ideal. They are best suited to outdoor environments where they can enjoy the natural cycle of the sun. However, during intense heat, it's important to ensure some protection to prevent potential stress from too much direct exposure.

Regularly check for pests like scale insects, aphids, and spider mites. Insecticidal soap can be effective against these pests, but be mindful of potential foliage damage.

Pruning and shaping are essential aspects of Juniper Bonsai care, allowing you to maintain the tree's miniature size and aesthetic form. Use sharp, clean tools to prune away dead or unwanted growth. Wiring can be used to shape branches, but it should be done carefully to avoid damaging the tree. It's best to prune and wire your bonsai during its dormant period in the winter months.

A healthy Juniper Bonsai will have vibrant green foliage and a sturdy, well-proportioned trunk. The presence of any yellowing or browning needles, weak growth, or pests may indicate health issues. Regularly inspect your bonsai for signs of distress and address any problems promptly to maintain its health and vitality.

Juniper Bonsais are hardy trees that can tolerate cold weather well. They should be grown outdoors year-round and can withstand temperatures as low as 10 degrees Fahrenheit without protection. In regions with extreme winter conditions, providing moderate protection from wind and frost can help your bonsai overwinter successfully​.

Use a balanced, slow-release fertilizer to nourish your Juniper Bonsai. Fertilizing can help your tree grow more vigorously and protect it from pests and diseases. Apply fertilizer during the growing season, following the product's instructions carefully to avoid over-fertilizing, which can harm your bonsai​.