Planting a Palm Tree or Palm bush outdoors west of the Cascade Mountains in the Pacific NW.
Planting palm trees is similar, in most ways, to planting other kinds of trees. Nursery-grown palms are generally sold in nursery pots or wooden boxes. Try to plant your tree shortly after purchase. If there is going to be any time lag between purchase and planting, make sure that the tree's root ball is kept moist but not soaking. When transporting and handling palm trees, use care. The best time of year to plant is in the spring summer & fall. But Palms can be planted year round in the Pacific NW(West of the Cascade Mountains).
Dig a hole wide enough to fit the root ball with plenty of room to spare. The hole should be at least half again the size of the root ball. The hole should be 25% to 50% deeper than the existing pot but just deep enough so that after you add the palm soil mix to the bottom of the hole the tree will be planted slightly higher (2 to 3 inches) than the depth at which it was grown or the surrounding area. Do not plant the tree any deeper. Never plant your palm in low areas were water pools up or stands in the winter. (Protect from high off shore winds if planting on the coast and never use beach sand in your soil mix). When the tree has been situated in the hole, backfill with a good quality Palm tree potting soil ( Hooked On Palms recommends a mix of a good quality potting soil like Miracle gro with moister control. Mix a large 55 or 60 quart bag with two (2) bags of all propose or landscaper sand. If you have a lot of clay you may want to use one bag of sand and one bag of pea gravel. Good soil mix with good drainage and proper palm fertilizer will allow them to thrive in the Pacific NW).
When the palm tree has been planted, build a soil barrier around the circumference of the hole to form a dam that will hold water for a month or two when watering. Then lay down a three inch layer of organic mulch (bark or bark dust works well) around the tree. Frequent watering is crucial for newly-planted palm trees especially in the summer and fall months, about every three days for about the first two weeks and then tapering off over several months as the tree establishes itself. I recommend using a water meter the first few years. You can learn more about proper watering of Palms at this web site link: http://www.hookedonpalms.com/faqandhelps/careforpottedpalms.html
For potted palms, plants or trees including Indoor or outdoor palms, dwarf citrus, bananas, Bird of Paradise or other tropical plants It is essential to have a pot with drain holes that is about 25% larger than the container they came in. Plant in a good quality potting soil. I recommend using a water meter. Remember nutrients leach out of the soil faster when plants are potted so it is important to feed your palms a good quality palm food.