This means you will need to fertilize the soil with proper nutrients. 4 gallons (15 liters) of water, being able to reach 5.5 gallons (20l) in summer. How To Care For Palm Trees Indoors The Ultimate Palm Plant Care Guide If we have palm trees on the ground we will have to give them all the water they need. Palm plant care outdoor . Caring for palms indoors and out. Situate the palm on a saucer filled with pebbles or sand, but do not sit the container in a saucer filled with water. However, before planting a palm tree, be aware that it might need to be acclimated to full sun exposure. Brown leaf tips are the most common care issue with indoor palm trees. How to winterize patio palms. Palm plants can fill the room in such a magnificent way, but nothing's sadder than an unhealthy palm tree. Palms of 6.5 ft (2 m) or less and just planted: Situate outdoor containers where they receive full or partial sun, depending on the variety of palm. Typically, potted palms te...