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Vegetable Crop Calendars (A–C)Asparagus Planting Calendar: Crowns vs. Seed
Asparagus is a long commitment, and the choice between crowns and seed changes how fast you get to a harvest and how much work the first year takes.
Key points
- Crowns give you a faster start than seed.
- Plant as soon as the soil is workable in spring.
- Prepare the bed well, because it will stay for years.
- Wait for the harvest schedule your guide gives for crown or seed.
- Let ferns grow after harvest to feed the crown.
Should you plant asparagus crowns or seed?
Crowns are one-year-old plants that have already been through the first stage of growth. They give you a head start and are the usual choice for home gardeners. Seed costs less but adds a year or so of tending before you have something resembling a crown, and the seedlings need weed control and attention in that first season.
Extension guides from several states recommend crowns for most gardeners, and they describe seed as a path for those who are patient or who want to raise their own transplants. Check your state guide for current recommendations on varieties that suit your area.
A simple rule helps decide: if you want asparagus in the shortest time and have a sunny bed ready, buy crowns from a reputable source and plant them promptly. If you are raising many plants on a budget and can keep the seedling bed weed-free, seed is a reasonable path.
When do you plant asparagus in spring?
Plant crowns as soon as the soil can be worked in spring, once the ground has thawed and is no longer waterlogged. Asparagus tolerates cool soil, and planting early gives roots time to establish before summer heat. Use your frost dates and your soil conditions as a guide rather than a set date.
For example, if the ground in your area usually becomes workable in early spring, that is the time to plan. Extension offices can tell you what that looks like for your county, and they publish planting windows for common vegetable crops.
How do you prepare a bed that will last for years?
The bed is the most important decision, because asparagus can stay productive for many seasons. Choose a sunny, well-drained site, and remove perennial weeds thoroughly before planting. Work in organic matter, and take a soil test so you can follow local recommendations on pH and nutrients. Nutrient management rules vary by state.
Dig a trench for crowns, set them with roots spread, and cover them gradually as shoots grow. Most guides recommend filling the trench in stages rather than all at once.
- Remove perennial weeds before planting.
- Test soil and follow local recommendations.
- Plant crowns in a trench and fill in as shoots grow.
- Mulch and keep the bed weeded in the first years.
When can you harvest a new planting?
The rule that most guides share is patience. A crown planting is usually left unharvested the first year, with light harvesting in the second and a fuller harvest in the third. A seed planting takes longer. The reason is that the plant has to build up stored energy in the crown, which it does through its ferns during summer.
Check your extension guide for a specific schedule, because it varies with variety and site.
Because the plantings last for so many years, keep a few notes on the bed. Record the planting date, any spring frost damage to spears, and the weeks when harvest ended each year, so you can fine tune your approach as the bed matures.
What happens to the ferns in summer and fall?
After harvest ends, the spears are allowed to grow into tall ferns. These feed the crown for next year. Let them grow through summer, and cut them back after they have turned yellow or brown in fall or early winter, according to your local guidance.
Some regions advise cutting earlier to reduce disease and insect carryover, so ask your extension office what suits your area.
Weed control during fern growth matters as much as it does during harvest. Hand pulling and mulch are common, and your extension office can advise on other options that suit your area.
What mistakes slow an asparagus bed?
Weeds are the main enemy of a young planting. Poor drainage is the second. Harvesting too early is the third, because it weakens the crown. Another frequent mistake is planting crowns that have dried out in storage, so keep them cool and moist and plant soon after you get them.
Pest and disease control are education topics here, so ask your extension office what to watch for. If a pesticide is ever needed, the label is the law, including pre-harvest intervals, and applicator licensing rules vary by state.
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.