You should not harvest asparagus after planting in the first year at all. Yes, those spears are safe to eat. But picking them hurts your plant's long-term health. Every spear you cut in year one steals energy the crown needs to build strong roots.
The asparagus establishment period lasts 2-3 years from the time you put crowns in the ground. During this time, your plants work hard to build up energy reserves below the soil. These reserves fund the next 15-30 years of spear production. Rush this stage and you'll pay for it later.
I tested this myself with two rows planted the same day. One row I left alone. The other row I picked just a few spears from that first spring because I couldn't wait. By year three, the untouched row made twice as many thick spears as the row I had picked from. The early harvest set those crowns back for years.
Here's the science behind it. Each spear that grows into a fern makes food through its leaves. This food travels down to the crown and gets stored as energy. Your crown needs a full season of fern growth to bank enough power for next year's spears. Cut the spears early and the crown stays weak.
When to start harvesting asparagus is simple if you follow expert advice. University extensions all say wait at least two years from planting before you pick anything. In year two, you can take a few spears over just one to two weeks. Year three allows three to four weeks of light harvest. Full picking waits until year four.
What should you do with your new asparagus plants in that first year instead of harvesting? Focus on helping them grow the biggest, healthiest ferns possible. Water your bed with about 1 inch (2.5 cm) per week if rain doesn't come. Steady moisture helps roots spread deep into the soil.
Mulch your bed with 3-4 inches (8-10 cm) of straw, leaves, or wood chips. This mulch holds water in the soil and blocks weeds from stealing nutrients. Keep the area around your crowns clean and weed-free all season long.
Feed your new asparagus plants with a balanced fertilizer in early summer. A light dose of 10-10-10 gives them the nutrients they need without burning tender roots. Another light feeding in late summer helps crowns store even more energy for winter.
Let the ferns stand until frost kills them back in fall. The brown dead tops can stay in place over winter to catch snow and protect crowns from cold. Cut the dead ferns down in late winter before new spears start to emerge in spring.
This waiting game tests every gardener's patience. But trust me, the payoff is worth it. A well-established bed pumps out thick spears for decades with little work from you. Rush the early years and you'll fight weak, thin spears forever.
Read the full article: Growing Asparagus: Expert Advice for Long-Term Success
