You’ll usually roast asparagus at a high temperature (around 425°F / 220°C) for about 10–15 minutes, adjusting a bit for how thick the spears are.

Quick Scoop

  • Thin asparagus: start checking at 8–10 minutes so it doesn’t overcook.
  • Medium spears: 10–15 minutes is the sweet spot at 425°F.
  • Thick spears: may need up to about 15–20 minutes until tender.
  • Visual cue: the asparagus should be tender when pierced with a fork and lightly browned at the tips.

Super simple method

  1. Heat the oven to 425°F (220°C).
  1. Trim off the woody ends of 1 bunch of asparagus.
  1. Toss spears with a little olive oil, salt, and pepper, then spread in a single layer on a baking sheet.
  1. Roast 10–15 minutes, checking early if they’re very thin and giving thicker spears a couple extra minutes as needed.
  1. Optional but delicious: finish with lemon juice and/or grated Parmesan right after roasting.

Handy time/size table (HTML)

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Asparagus size Oven temp Roast time (approx.) Notes
Very thin spears 425°F / 220°C 8–12 minutes Start checking at 8 minutes to avoid overcooking.
Medium spears 425°F / 220°C 10–15 minutes Most common range in popular recipes.
Thick spears 425°F / 220°C 12–20 minutes Go toward the higher end; check tenderness with a fork.

A good rule of thumb: cook just until the stalks are bright green, lightly browned at the tips, and yield easily to a fork — then pull them out right away for the best texture.

TL;DR: For everyday cooking, trim, oil, season, and roast asparagus at 425°F for 10–15 minutes, adjusting a few minutes up or down based on thickness.

Information gathered from public forums or data available on the internet and portrayed here.