How Do You Grow White Asparagus

How do you grow white asparagus?

You grow white asparagus by planting one-year-old crowns in deep, sandy soil and then constantly hilling dirt over the spears as they emerge so they never see sunlight.
 
That lack of light is the whole secret behind white asparagus, because the spears stay pale and mild instead of turning green and grassy.
 
If you’ve ever wondered how do you grow white asparagus at home, the answer is simpler than it looks, though it does demand patience and a bit of muscle.
 
Growing white asparagus isn’t hard, but it takes about three years before you harvest your first real crop.
 
In this post, we’ll walk through how do you grow white asparagus step by step, from picking the right spot to blanching those spears and pulling them at the perfect moment.
 

How Do You Grow White Asparagus: The Basics

Growing white asparagus starts with understanding that it’s the same plant as green asparagus, just grown differently.
 
The difference is entirely about light, and once you get that, growing white asparagus becomes a matter of routine.
 
Here’s what makes it work.
 

1. Start With the Right Crowns

You grow white asparagus from crowns, not seeds, if you want a harvest in a reasonable timeframe.
 
Buy one-year-old crowns from a nursery and plant them in early spring while the soil is still cool and workable.
 
These crowns already have a root system, so they establish faster than seeds ever would.
 

2. Choose Deep, Sandy Soil

White asparagus loves loose, sandy soil that drains well and lets you dig deep trenches.
 
Clay soil holds water and can rot the crowns, so amend heavy ground with compost and sand before planting.
 
The soil also needs to be weed-free, because asparagus doesn’t like competition while it’s getting established.
 

3. Plant in Deep Trenches

Dig trenches about twelve inches deep and set the crowns at the bottom, spacing them a foot apart.
 
Cover them with just a couple inches of soil at first, then fill the trench gradually as the shoots grow through the season.
 
This slow backfilling encourages strong root development and sets you up for years of harvests.
 

Blanching: The Heart of Growing White Asparagus

Blanching is the step that separates white asparagus from green, and it’s where most beginners slip up.
 
You blanch by mounding soil over the rows so the emerging spears stay buried in total darkness.
 
No light means no chlorophyll, and no chlorophyll means those tender, ivory-colored spears.
 
Here’s how to handle the blanching process.
 

1. Build Up the Ridges

As soon as shoots start poking up, pull soil from between the rows and pile it over them.
 
Keep a ridge about eight to ten inches tall running along the row, and reshape it after every rain.
 
Growing white asparagus depends on this ridge staying intact, because one crack of sunlight will turn a spear purple or green.
 

2. Watch for Cracks in the Soil

When a spear is ready, it pushes up and creates a small crack or mound in the ridge.
 
That crack is your signal, and it’s how you know exactly where to reach in.
 
Check your beds every morning during harvest season, because spears can grow several inches overnight.
 

3. Harvest by Hand, Carefully

Use a narrow asparagus knife or your fingers to feel down to the base of the spear.
 
Cut it about an inch below the soil surface, then refill the hole and smooth the ridge back down.
 
Handle the spears gently, since white asparagus bruises easily and the tips are fragile.
 

Timing and Patience When You Grow White Asparagus

Patience is the price of growing white asparagus, and there’s no way around it.
 
Don’t harvest anything the first year, and only take a light picking the second.
 
By the third year, you can harvest for about six weeks each spring, and the bed will keep producing for fifteen to twenty years.
 
Stop cutting when the spears start coming up thin, which tells you the plant needs to rebuild its energy.
 
Let the remaining spears grow into tall ferny stalks and leave them through summer to feed the roots.
 
Cut the foliage back in late fall once it yellows and dies down naturally.
 

So, How Do You Grow White Asparagus?

You grow white asparagus by planting crowns in deep, sandy soil and then burying the spears in darkness so they never turn green.
 
Blanching with soil ridges is the key step, and patience through the first two years is what gets you a bed that lasts for decades.
 
Learning how do you grow white asparagus is really about committing to the process, checking those ridges every morning, and harvesting at just the right moment.
 
Once you taste your own homegrown spears, all that hilling and waiting will feel completely worth it.