What Size Raised Bed For Asparagus?

Start with well-draining soil that’s about 8 inches below the rim of your bed. That means your raised bed needs to be at least 12 inches high to give the roots room to grow, though I recommend building a bed up to 24 inches high for easy harvesting.

Does asparagus grow well in a raised bed?

By planting the asparagus crowns in a raised bed with a soil mix that includes loamy, organic matter, you can ensure good drainage. Another reason to plant asparagus in a raised bed is because it is a perennial crop and can remain productive for 10 to 12 years.

How deep should asparagus bed be?

about 12 inches deep
Plant asparagus about 12 inches deep in the soil. Asparagus likes to grow in rich soils, and will deplete the nutrients over time. Be sure to amend the planting area with organic matter and soil amendments like compost if you haven’t already done so. Use a soil mix rich in organic matter.

How do you raise asparagus in a raised bed?

Most of today’s asparagus crowns need to be planted six-inches deep. To plant them in a raised bed, just fill the bed with six inches of soil (half way, if your bed is a foot deep). Then, lay the crowns a foot apart, and spread the roots out around them, like you see here.

How much space does an asparagus plant need?

Space green varieties 8–14″ apart in-row and purple varieties 6–8″ apart in-row; closer spacing of purple asparagus creates more slender spears. Allow 3–6′ between rows. Cover crowns with 2–3″ of soil at planting. As spears grow, gradually fill in furrow.

Will asparagus survive winter in a raised bed?

In mild climates, the root crowns of asparagus need no special winter care, but in cooler regions, winterizing the asparagus bed is a must.

How deep do asparagus roots go?

Asparagus roots grow to an astonishing size of 5–6 feet (1.5–1.8 meters) in diameter and 10–15 feet (3–4.5 meters) deep. These plants, sometimes mistakenly called asparagus ferns, are also highly invasive.

What can you not plant next to asparagus?

There are two main crops to avoid growing alongside asparagus:

• Alliums. Alliums like leeks, garlic, and onion sharing the soil with asparagus are said to stunt its growth.
• Potatoes. Asparagus, on the other hand, stunts the growth of potatoes when they share the same space.

Does asparagus take three years?

If started from seed, asparagus will take about 3 years to become productive. One-year-old asparagus crowns will need two years of growth prior to harvesting and two-year-old crowns, just one year.

Can you plant asparagus too deep?

Cultivating too deep, or at the wrong time in the season, can damage the crowns and emerging spears. There are two times when asparagus beds can be cultivated: Before the spears come up in the spring, and after all of the spears are harvested but before ferns come up in late June.

Will asparagus spread on its own?

Yes, asparagus will spread as it grows. Asparagus roots can spread out up to 6 feet (1.8 meters) underground. Asparagus ferns (mature spears with foliage) can spread out 3 feet (90 centimeters) above ground. An older, more mature asparagus plant will send up more spears from its larger crown and energy reserves.

What is the best time to plant asparagus?

spring
Plant asparagus in spring or fall in a sunny spot with nutrient-rich, well-drained soil. Asparagus takes a few seasons to mature but will reap a harvest for 15 to 30 years, so choose a planting location that will go undisturbed for a long time.

How much asparagus should I plant for a family of 4?

Obviously, the amount of room you have in your landscape for planting will play a role in this. But, if space is not an issue, 10-20 plants per person is a good start. Since asparagus is a perennial crop, site selection is going to be important. It’s not uncommon for asparagus plantings to last for 15+ years.

How much room do you need for 20 asparagus plants?

If you want to harvest 10 pounds per season, you’ll need a row of 20 plants, spaced one foot apart.

Can you grow asparagus in a planter box?

Fill the bottom 2 inches (5 cm.) of the pot with gravel. Then, fill the remainder with a mix of high quality potting soil and compost. Plant the asparagus crown into the container by following the package instructions, most often, planting the crown about 4 to 6 inches (10-15 cm.)

What kind of mulch is best for asparagus?

Straw, pine needles, pine shavings or bark mulch work well as mulch choices. Avoid using dyed mulches (black or red). Avoid using synthetic mulches like black plastic or landscape fabric.

Should I mulch my asparagus bed?

And here’s how to simplify weed control in your asparagus bed: Use a loose mulch. Good mulching materials include sawdust, wood chips, shavings and ground corncobs. These materials shut out weed growth, but still permit asparagus to come up. Caution: if applied too early, it may tend to keep the soil cool.

Can you plant tomatoes and asparagus together?

ASPARAGUS ‘illustrates the give and take of good companion planting,’ says Ron Finley. ‘Tomatoes repel asparagus beetles with a chemical called solanine, and asparagus help to clear the soil of root-knot nematodes attracted to tomatoes. ‘

Do I cut back asparagus in the fall?

Answer: The asparagus foliage can be cut back to the ground after it has been destroyed by cold temperatures in fall. However, it is generally recommended that the dead foliage be allowed to stand over winter.

What happens if you don’t harvest asparagus?

You should harvest all of the spears that come up until the end of the harvest period, even the small diameter ones. If you don’t, asparagus beetles will lay their eggs in those ferns.

Are coffee grounds good for asparagus?

* Coffee grounds alone would be too acidic, but if you’re mixing them in with other kitchen waste and especially yard waste like leaves, they’re fine. Asparagus prefers a soil pH between 6.5 and 7, which is mildly acidic. Coffee grounds can run 5 or less on the pH scale by themselves.