Jersey Giant

Asparagus

Zone 9a Save Garden

🌱 730d to harvest Perennial_Crown

Unfurling from the crown in towering spears, Jersey Giant delivers a lush, sweet snap with a tender, finely textured bite and a g…

Crop Dates

Milestone	Date
Start Indoors	Dec 26th
Last Frost	Mar 6th
Transplant / Sow Outdoors	Feb 20th
Harvest Begins	Feb 20th
Harvest Ends	Nov 26th

Crop Details

Trait	Value
Days to Maturity	730
Sun Requirements	Full Sun
Growth Habit	Perennial_Crown
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	50
Min Night Temp (°F)	35
Harden Off (days)	7

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Frequently Asked Questions

What pest or disease most commonly affects asparagus (Asparagus officinalis) like Jersey Giant, and how can I control it?

Asparagus beetles (adults and larvae) can strip spears and foliage; check plants weekly and hand-pick beetles when you first notice them. If infestations are heavy, spray an approved insecticidal soap or neem during calm weather, focusing on new growth, and remove badly damaged ferns at season’s end to reduce carryover.

How often should I water asparagus (Asparagus officinalis) during its main growing phase to keep soil moisture right?

During spear production, keep the soil consistently moist but not waterlogged—about 1–2 inches (2.5–5 cm) of water per week from rainfall plus irrigation is a good target. Aim for deep soaking so moisture reaches the crown and roots, then let the top 1 inch of soil dry slightly before watering again to avoid rot.

How do I tell when Jersey Giant asparagus spears are ready to harvest?

Harvest when spears are firm and tight-tipped, typically 6–8 inches (15–20 cm) tall, with a thickness that is workable for your use. Start spears at the base and cut at soil level, and stop harvesting once the spears thin down and become more numerous than thick—then switch to letting ferns grow to rebuild root energy.

Unfurling from the crown in towering spears, Jersey Giant delivers a lush, sweet snap with a tender, finely textured bite and a graceful, deep-green finish. Expect thick, substantial stalks that hold their poise—ideal for showcasing as the star of the garden’s early harvest. Grow Jersey Giant for a long-lived stand that rewards patience with abundant, premium spears year after year.

Sowing Tips

Transplant Conditions

Wait until soil reaches 50°F and nights stay above 35°F before moving outdoors. Harden off for 7 days first.

Expert Note

Grow asparagus as a long-lived bed: keep new crowns weed-free and harvest lightly in year 3 (none in year 1–2) for strongest long-term spear production.