Find a planting site for an All-in-One almond tree in full sun. This tree can thrive in soil of average fertility as long as it has good drainage. The All-in-One almond tree requires 500 hours of freezing temperatures during the winter and long, hot summers to produce a good crop of almonds.
Water a young All-in-One almond tree with 1 to 2 inches of water per week during the first two growing seasons after planting. An almond tree with a well-established root system does not require supplemental watering except during periods of extreme drought.
Apply a high-phosphorus fertilizer during the early spring before the All-in-One almond tree begins to grow. Phosphorus is the middle number in the NPK fertilizer rating system, so an 18'51'20 is high in phosphorus. Almond trees grow best with granular fertilizer, which generally involves scattering the fertilizer lightly under the spread of the tree.
Prune an All-in-One almond tree with tree shears during the winter when the tree is dormant. Remove all diseased growth and the oldest 20 percent of the healthy growth. This practice encourages maximum fruit production.