How to Make a Cold-Brew or Overnight Nettle Infusion

What Is a Cold-Brew Nettle Infusion?

A cold-brew or overnight infusion is exactly what it sounds like: instead of pouring hot water over nettle leaf and steeping for a few minutes, you combine nettle and cold water and let it sit, refrigerated, for several hours or overnight. The result is a smoother, milder cup with less of the slight bitterness that can come from a hot, long steep — and it's an easy way to have nettle tea ready and waiting the next morning.

Why Try the Cold-Brew Method

• Smoother flavor. Cold water extracts flavor more gently than hot water, which tends to soften any bitterness and highlight nettle's milder, more rounded notes.
• Convenience. Set it up before bed and wake up to tea that's ready to strain and drink — no active brewing time in the morning.
• Great for iced tea. Since it's already cold, a cold-brew nettle infusion goes straight from the fridge to a glass of ice with no cooling step required.

How to Make Cold-Brew Nettle Tea

1. Choose a clean container. A glass pitcher, mason jar, or any food-safe container with a lid works well. Wash it thoroughly before use.
2. Add nettle leaf. Use about 1 tablespoon of dried nettle leaf per 8 ounces of water — slightly more than you'd use for a hot brew, since cold extraction is less efficient.
3. Add cold, filtered water. Pour the water over the leaf and stir gently to make sure the leaf is fully submerged.
4. Cover and refrigerate immediately. Don't leave it out on the counter first — go straight into the fridge.
5. Steep for 8 to 12 hours. Overnight is the easiest way to time this. Nettle, being a leafier, less delicate herb, generally benefits from the longer end of that range.
6. Strain and serve. Strain out the leaf with a fine-mesh strainer or cheesecloth, then drink cold or gently warm it if you'd prefer a hot cup.

Food Safety: What to Know Before You Start

Cold brewing skips the boiling water that would normally kill any bacteria present on dried leaf, so a few precautions matter more here than they do with hot tea.

• Always refrigerate — never counter-brew. According to Iowa State University Extension and Outreach, tea can be brewed safely in the refrigerator for six hours to overnight, but should never be steeped at room temperature or in direct sun ("sun tea"), which the CDC has discouraged since 2011 because the temperature never gets hot enough to kill bacteria that may be present.
• Keep your fridge at or below 40°F (4°C). This is the standard safe-cold-storage threshold referenced across food safety guidance for refrigerated beverages.
• Use a clean, sanitized container. South Dakota State University Extension recommends starting with a container that's been properly cleaned and sanitized, since cold brewing doesn't provide the heat-based sanitizing step that hot brewing does.
• Drink it within a few days. Iowa State University Extension recommends finishing refrigerated tea within about three days for best safety and quality.

Cold-Brew vs. Hot-Brew Nettle Tea

Serving Ideas

• Straight over ice with a squeeze of lemon.
• Blended with a cold-brewed second herb, like peppermint or lemon balm, added to the same jar before refrigerating.
• As a base for iced tea lemonade, mixed half-and-half with fresh lemonade.
• Warmed gently on the stove if you'd rather have it hot — cold-brewed nettle can be reheated without any issue.

Frequently Asked Questions

Can I leave nettle tea out on the counter to cold brew?

No — this is sometimes called "sun tea" or counter-brewing, and food safety guidance advises against it, since the temperature never gets hot enough to kill bacteria that could be present on the leaf. Always refrigerate while steeping.

How long does cold-brew nettle tea last in the fridge?

Plan to finish it within about three days for the best safety and quality, based on general refrigerated-tea guidance from food safety extension sources.

Do I need more nettle leaf for a cold brew than a hot brew?

Yes, slightly. Cold water extracts flavor less efficiently than hot water, so using a bit more leaf — roughly a tablespoon per 8 ounces of water — helps produce a fuller-flavored cup.

Can I mix nettle with another herb in the same cold brew?

Yes. Adding a second herb like peppermint or lemon balm to the same jar before refrigerating is a simple way to cold-brew a blend in one step.

Related Reading

• The Complete Guide to Stinging Nettle Leaf
• The Best Herbs to Blend with Nettle Tea
• Nettle Tea vs. Green Tea: How They Compare
• Cooking with Nettle Beyond Tea: Soups, Pesto, and More
• Shop Organic Stinging Nettle Leaf

Sources & References

Iowa State University Extension and Outreach, AnswerLine. Iced Tea Safety. Guidance on cold-brewing, sun tea risks, and refrigerated tea storage times.

Iowa State University Extension

South Dakota State University Extension. How to Make Cold Brewed Teas Safely. Food safety considerations specific to cold brewing tea.

SDSU Extension

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Read the full Stinging Nettle Leaf Guide, or shop our organic stinging nettle leaf.