Amazon Lily (Eucharis grandiflora) Amazon lily is a stunning plant with fragrant white blossoms and large, attractive leaves. Light Expose to medium (bright indirect) light. Water Keep soil evenly moist except during winter, when it should be kept a little drier. Raise humidity. Temperature Maintain temperatures of 68 degrees or higher for sprouting bulbs and above 60 degrees for mature plants. Comments Plant bulbs a half-inch deep. To ensure good bulb development, allow flowering only twice a year, pinching buds at other times. Propagate by offsets or seed. Maintain temperatures of 80 to 85 degrees for proper seed germination.