How to Grow Coconut Palms Indoors

Cocos nucifera (Coconut Palm Tree), green leaves on long stems growing from coconut
Peter Chadwick/Dorling Kindersley/Getty Images

If you're looking to transport yourself to the beach—even if only in your mind—then you should consider trying your hand at growing a tropical varietal, like a coconut palm. Word of warning, though: Unless you do actually call a beachside bungalow home, this pesky palm will probably give you a run for your money.

Characterized by a tall, grey-brown slightly curved trunk, sprawling palm frond, and, of course, coconuts, this plant is native to many tropical regions (think: the western pacific islands, Florida coast or Caribbean islands) and loves all things, well, tropical. Even with unlimited space and resources, it can be tough for a home gardener to replicate the moisture, temperature, and sun levels needed for the coconut palm to thrive indoors—not to mention that mature plans (between four and 10-years-old) can sprout to be up to 100 feet tall!

Besides acting as a charming backdrop to every island paradise dream out there, coconut palms are an extremely valuable plant, regularly harvested to provide food and oil, as well as material for clothing, construction, and more. While it's built up a tough reputation as a house plant, we're all for encouraging you to give coconut palms a shot—even pint-sized palms can be a great, summery addition to any home.

Botanical name Cocos nucifera
Common name Coconut palm
Plant type Tropical evergreen
Mature size 50–100 ft. tall, 20–40 ft. wide
Sun exposure Full sun
Soil type Sandy, loamy, well-drained
Soil pH Neutral to acidic 
Bloom time Year-round
Flower color Yellow
Hardiness zones 10–12 (USDA)
Native area Western pacific 
Toxicity Non-toxic

Coconut Palm Care

Native to tropical islands in the western pacific, the coconut palm is probably what comes to mind for many when you say the phrase "palm tree." Once mature, coconut palms can reach a staggering height of up to 100 feet, and boast 10 to 20-foot palm fronds and a rotating collection of fresh coconuts. In their more juvenile form, however, they can be found in many local nurseries as sprouted coconuts with just one or two immature seedlings visible, and no stipe. They need lots of sunlight, heat, and water to thrive, which can often make them difficult to grow and frustrating for gardeners looking for immediate results.

Light

Coconut palms thrive in full, bright sunlight. Even those found in nature can fail to proper if in the shade, so it's extremely important that any indoor coconut palm receives ample sunshine. During the fall and winter months, consider placing your palm under a grow lamp or another artificial light source to help make up for the loss in sunlight. Additionally, depending on its placement in your home, you may have to move your plant's location throughout the day to "chase" the sun and ensure proper exposure. As a good rule of thumb, you should aim for at least six hours of full sunlight each day.

Soil

Coconut palms are used to growing in a variety of soil conditions and are therefore not terribly picky about their planting mixture. That being said, a combination that closes mimics the coconut palm's natural environment is always your best bet. Typically, this means mixing a neutral to acidic potting soil with a bit of sand or vermiculite to maintain a well-draining environment (you could also skip the sand and opt instead for a drier cactus mix). Additionally, you can add a few layers of mulch to the top of the soil to help it retain moisture. Be sure your pot is at least 12 inches deep to start, in order to provide plenty of soil for the palm to take root in. Once roots have sprouted, you'll want to graduate it to a planter that holds at least 10 gallons of soil.

Water

Like many tropicals, the coconut palm is one thirsty plant. Keep the soil consistently moist by saturating with warm water once to twice a week. As long as you've chosen a well-draining soil (see above), you really can't overwater a coconut palm—after all, they're used to between 40 and 60 inches of annual rainfall in their natural environments.

Temperature and Humidity

Keep your coconut palm nice and cozy at all times. It can survive in temperatures that are at least 70 degrees Fahrenheit and up (though they grow best in temperatures between 85 and 95 degrees Fahrenheit) and may fail to thrive if its surrounding climate dips below 64 degrees Fahrenheit. Humidity is an important factor, too—maintain a moist environment for your palm with the addition of an in-room humidifier, as well as frequent spritzing with warm water. Your plant may also benefit from the addition of a mini greenhouse while still in infancy (you can remove once the palm is approximately 12 inches tall).

Fertilizer

Feed your palm year-round with a weak liquid fertilizer, and increase frequency during the summer months when it's actively growing. Coconut palms are known to have several nutrient deficiencies, including a lack of phosphorus, nitrogen, manganese, and boron, so seek out a fertilizer blend specifically made for palm trees in order to supplement these losses.

Propagating Coconut Palm

If you can't find a coconut palm at a nearby nursery or store, you can still grow one indoors using—you guessed it—a coconut. To sprout a coconut palm, start with a coconut that still has some of its husk on and sounds full of water when you shake it. Place it in a bucket of room temperature water and soak for up to three days to help jumpstart the germination process. Next, bury the nut in a moist but well-draining soil mixture, leaving the top half exposed above the soil. Move the pot to a warm, well-lit area and continually water it (without allowing it to sit in water) every three days or so. With the right environment, you should see a seedling appear through the shell of the coconut within three to six months.

Potting and Repotting Coconut Palm

Sprouted coconuts can be potted in three-gallon pots (about 12 inches of soil). Their root balls are fairly small and shallow to start and, as a result, they don't need a ton of soil in the early growing months. However, once your coconut palm's roots grow to be about six to eight inches long, repot the plant into a vessel that holds at least 10 gallons of soil.

Common Pests and Diseases

In their native habitats, coconut palms are fairly resistant to insect predators, but in the home, you might see mealybugs or spider mites on the leaves. Additionally, it's common for coconut palms to be plagued by "lethal yellow," a fungal disease that causes yellowing leaves, dropping fruit, and eventual death. While trees can be given antibiotics, such treatment is not always successful and most palms end up succumbing to the disease.