Asparagus grows as a perennial vegetable that produces spears for more than 15 years. The plant is ready for harvest in May. All male hybrid cultivars offer a larger harvest with thicker spears then the female asparagus plant. Female plants expend most of their energy producing berries that contain seeds, which significantly limits its crop production capacity. Plant asparagus from April to May when the soil temperature raises above 50 degrees F. Choose one-year-old crowns for the best success. Growing asparagus from seed takes up to three years before the plants are large enough to begin harvesting.
Choose a planting location that receives a minimum of eight hours of sunlight per day. Well-draining soil with a pH balance of 6.5 to 7.5 is ideal.
Till 1 lb. of 5-10-5 fertilizer per 100 square feet of garden space two weeks prior to planting asparagus. Work the soil to a depth of 6 inches prior to planting. Remove any weed growth and discard.
Dig a furrow 6 inches deep. Space each furrow 5 feet apart.
Sprinkle 1 lb. of 0-46-0 super phosphate for every 50 feet of furrow. The crowns of the asparagus plant require ample phosphorus to establish.
Place the asparagus crowns directly on top of the super phosphate. Plant each crown 18 inches apart in the furrow.
Cover the crowns with soil. Do not compact the soil.
Water the asparagus plant when dry. Keep the soil moist, but not water-logged.
Apply a general-purpose fungicide when the asparagus begins to produce fern-like foliage. Use the fungicide every two weeks until fall.