Impatiens can be planted under trees although special care is needed, as the tree roots will compete with the flowers for space, water, and nutrients.  here will require frequent watering and additional fertilizer.

One easy solution is to construct a slightly raised garden six to eight feet from the tree. Or you can dig out roots, if they are some distance from the tree, and fill the holes with a soil mix for planting.

Bedding plants are available at most nurseries and garden centers. Select plants that have a bushy appearance and healthy foliage.

New Guinea impatiens also may be started from seed six to ten weeks prior to planting outdoors. This hybrid tolerates more direct sunlight and grows taller than traditional varieties.

Harden off seedlings before transplanting outdoors. Be sure to wait until the danger of frost is past before planting in the garden.

When spacing plants, remember that the more tightly they are spaced, the taller they will grow. Before digging holes for the transplants, think about how tall you want them to grow.

For example, if plants are used for a border, space them eight to 12 inches apart so they will spread but remain low growing.

Mix in compost or a slow-release fertilizer before transplanting your impatiens. Water thoroughly and continue to water throughout the growing season.

Keep soil moist, but avoid overwatering as this could encourage fungal diseases. So may overhead watering late in the day as the foliage will not have sufficient time to dry before nightfall.

If you want to grow impatiens in window boxes or other containers, use a sterile or soil-less growing mixture rather than garden soil to allow for better drainage.

Space according to the height you wish the plants to attain. Remember, container plants will need more frequent watering than plants grown in gardens.