Asparagus grows well in most areas of the United States, except the Deep South. It thrives in a climate where the winters are cold enough to freeze the top few inches of soil and provide it with the necessary period of dormancy. Although asparagus can be started from seeds, the best-quality plants come from crowns that can be ordered from a nursery. Plant asparagus four to six weeks before the area's average date of last frost.
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A trench helps deliver sufficient water to asparagus spears as they grow.
Asparagus should not be harvested until it is three years old; the crowns need time to develop fully. During the third season, cut off the spears at or slightly below soil level. Harvest asparagus when the spears are 8 to l0 inches tall; if the stalks have started to feather out, it's too late to eat them. Stop harvesting when the stalks begin coming up pencil-thin.
Asparagus Growing Tips
These tips will help you grow succulent and delicious asparagus:
- Mulch asparagus every spring with several inches of compost or decayed livestock manure. Asparagus, a greedy feeder, will use all the nutrients it can get its roots on and grow that much better for it. By mulching in the spring, you can fertilize, help keep the soil moist, and reduce weed seed germination all in one effort. The shoots that arise through the mulch will grow especially plump and succulent.
- Make fancy white asparagus spears with a simple blanching basket. This European connoisseur's vegetable is easy to grow at home. When the spears first emerge in spring, cover them with a bucket, basket, or mound of soil that will exclude all light. Harvest when the spears reach 8 to 10 inches tall and before the ferny leaves begin to emerge.
You have several types of asparagus to choose from when growing asparagus in your home garden. White asparagus is not listed below, because it is not a different variety of asparagus -- it is green asparagus that is grown without exposure to sunlight. We've listed the different varieties of asparagus below.
- Mary Washington is widely available and resistant to asparagus rust.
- UC l57 was developed for Southern climates. It is resistant to fusarium root.
- Purple Passion is a novelty with purple spears.
- Jersey Giant is disease resistant.
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