Impatiens (Impatiens wallerana) are annuals producing brightly colored blooms in pink, orange, white, salmon, purple and red. Flowers begin blooming in spring through the first frost. Height and width range from 9 to 30 inches. Impatiens varieties such as Accent Blitz Carousel, Dazzler, Impulse, Showstopper, Mosaic and Super Elfins thrive in shade, making them the perfect choice for planting under pine trees. However, New Guinea impatiens (Impatiens hawkeri) prefer partial sun.
Dig a hole under the pine tree using a garden shovel or trowel. Make the hole as deep as the root ball of the impatiens plant.
Spread 3 inches of a slow-release fertilizer evenly across the bottom of the hole.
Remove the impatiens from the container and place it in the hole.
Fill the spaces around the impatiens' roots with garden soil. Add 2 inches of water, or water until the soil is moist throughout. Space the next impatiens 18 inches away for tall-growing impatiens and 8 inches away for compact impatiens.
Fertilize impatiens every month with a water-soluble fertilizer, as the impatiens' roots compete with the pine trees' roots for nutrients.
Continue to add 2 inches of water to the impatiens each week. Check the soil after rainfall to ensure enough water reached the impatiens through the pine tree branches.