Plant almond trees in well-drained soil and avoid low-lying areas in the landscape. The microclimate in a low-lying area is cooler than that on a slight rise or hill. More moisture also accumulates in low-lying areas.
Spray the trees with a fungicide formulated for almond blooms in spring if rainy or humid weather is an issue. Spray once at full bloom, following package application instructions, and make a second application three weeks after flowering ends.
Water the almond tree every two weeks during the spring and summer growing season. Supply enough water to thoroughly moisten the soil to a 24-inch depth.
Fertilize mature almonds with 4 lbs. of an ammonium sulfate fertilizer, applied at the onset of blooming in spring. Trees do not require fertilization if they put on at least 8 inches of new growth in the previous year. Water the trees thoroughly after a fertilizer application.
Harvest the almonds once the green hulls begin to split. Almonds left on the tree after splitting might rot in humid weather.
Peel the hulls from the nuts so they dry more quickly. Spread the nuts out in a single layer in a warm, dry location. Dry the almonds for three to seven days, or until the nuts rattle inside the shell. Almonds are typically dried outside in the sun after harvesting, but in humid weather it's necessary to dry them indoors in a well-ventilated area to protect them from air moisture.