Outside in drier environments some of the more tropical palms will suffer when the humidity is low, and  inside of your home steps should always be taken to increase the humidity around your plants.  Plants from desert regions can take lower humidity levels, but most of these palms require full sun and would not flourish in your home.  A relative humidity between 40% - 60% is ideal for most plants, and helps to keep them a good color and pest free, yet the interior of your home is usually much lower. 

Steps to increase humidity are:

Containers sitting in a small saucer of pea gravel and water (as long as water does not reach the bottom of the container)

Misting your plants daily

Adding a humidifier to your home

Placing your plants together in groups
Climate
Indoors or out your tropical plants climate is important to its overall health. 
Temperature
Growing palms, and other tropicals outdoors has always been limited by low temperatures.  Research into winter protection, and the hardiness of specific plants has helped many people grow more exotic plants with fewer worries.  The Cold Rating Database (CRDB) has listed the average minimum temperatures for many palms, and other tropicals and is a great guide, along with the USDA zone map in determining, what you can grow in your area outdoors in the ground, yet keep in mind its not only the minimum temperature but also long periods of temperatures below 55 F.  Like pH temperature controls nutrient uptake by the plant.  The Cool Tropix has an extensive list of cold protection designs, and articles to help you.  A link to The Cool Tropix can be found in Palm Links.
Indoors tropical plants thrive in a temperature range from about 65F to about 80F.  During the day the plants enjoy the heat and at night a lower temperature is needed, but keep in mind direct sun through a window can create to much heat and burn the leaves while a forced air heater or air conditioner  will dry them out.  On average a plants growth
Air Circulation
Plants require areas with good air circulation, but drafty areas should be avoided.  A/C and heater ducts create problems, but if you need to improve your air circulation a breeze from a small fan (not directly on your palms) will help move fresh air through the room.  Basements and closets almost always have poor air circulation and a small fan should be used.  When arranging your plants (inside or outside) group them together for increased humidity, but avoid letting them overlap or touch.    
Humidity
Watering
Containers
The best way to water is from the top, when the soil has become dry about an inch below the surface.  You may have to water 1-2 times per week depending on the sunlight your plant receives.  The less sun your plant recieves and the slower it grows, the less water it will need.  One of the leading causes of death to interior plants is over watering.  Make sure that you really need to add more water, and the bottom of the container is not submerged in water.  Room temperature water is best, and if possible use filtered of soft water.  Another important thing to remember is about every 6 months you should rinse your soil free of excess salts.  To do this place your plant in a sink or take outdoors and run water into to container until it drains from the bottom for about 30 seconds. 
In the ground
This depends on the native location of the plant and your location.  A tropical shade  palm needs to stay moist in a dry location, where as a desert palm in a wet location should have good drainage and won’t need much supplemental watering.  Mulch is very helpful for all plants by holding in moisture and heat.
Plant Washing
Indoors the foliage should be checked and cleaned about every couple weeks.  This step will help prevent dust, insects, and other diseases from building up on your plants foliage.  To do this  mix a very small amount of dish soap or a plant cleaner with water (if using dish soap add so little that it barely foams).  Use a soft cloth  and gently wipe all leaf surfaces.  Another thing you can do, if in a hurry,  is take them outside in a shady area and hose them off.
Outdoors the rain will keep it semi clean but still check the foliage and remove any unwanted insects, eggs, or fungus with a damp soft cloth.

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The Palm Shop is a Florida Registered nursery # 47232878 FNGLA certified horticulture professional certification H99 6248

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