How to Dry Sage: Air, Dehydrator, Oven or Microwave

Sage is one of the few herbs still worth cooking with once it’s dried, and it’s one of the easiest to dry yourself. Penn State Extension names it, along with thyme and winter savory, as the easiest of all.¹ It’s sturdy enough to dry well without a dehydrator, too. What matters most is heat: dry it gently and you keep most of sage’s aroma. Dry it hot and you lose a lot of it.²

At a glance

Method	Temperature	Time	What the sources say
Air drying	Room temperature, dry and airy, out of the sun³	A week or more; no fixed time³	Small aroma losses in a lab comparison²
Dehydrator	95 to 115°F (NCHFP);⁴ 95 to 110°F (Penn State)¹	1 to 4 hours⁴	The most controlled home method
Oven	Lowest setting, not above 180°F, door open¹	3 to 4 hours¹	“Generally not recommended” by Penn State¹
Microwave	High or low power, in short bursts	Seconds to minutes; sources disagree (see below)	For small amounts only

Before you start

Harvest just before flowering. For most herbs, harvest for drying just before the flowers first open. For sage in particular, PROSEA reports that leaves of non-flowering plants have the most essential oil, and sage stems have very little,⁵ so it’s the leaves you’re saving. Herbs have more of their essential oil when you pick them mid-morning, after the dew has dried, Penn State adds.¹

Rinse and dry the leaves. Rinse in cool water and shake off the excess, and toss bruised, dirty or damaged leaves. Get them as dry as you can before you start any method below. Water left on the leaves just makes drying take longer.

Air drying

This is the go-to method for sage.

Bundles. Herbs like sage, mint or thyme can be tied in small clusters and hung somewhere dry with good airflow, away from the sink, stove or dishwasher. America’s Test Kitchen (ATK) hangs its bundles upside down by the tied end.
Loose leaves. Drying the leaves separately is especially nice for sage, mint and bay leaf. Spread them in a single layer on a screen or tray.
A paper bag. A bag punched with holes keeps dust off the bundle.

Where. Pick a dry, well-ventilated spot away from direct heat and sunlight, which ATK says can fade flavor and color.³ Penn State doesn’t recommend sun drying at all in its humid state.⁶ You’ll often hear that sage dries best somewhere hot, like an attic. The sources say otherwise. PROSEA says a warm, airy room is best for small batches and puts the ideal drying temperature for sage at 25 to 30°C (77 to 86°F), to limit oil loss.⁵

How long. It can take a week or weeks, ATK says, so take a test pinch now and then.³

What the research shows. A 2012 study dried sage six ways. Air drying in the shade at room temperature was one of three methods that lost only a little of sage’s aroma compounds. The other two were oven and infrared drying at 45°C.² An earlier study found a significant loss of sage and thyme volatiles only when the herbs were dried at 60°C.⁷

Dehydrator

A dehydrator gives you the most control, as long as it goes low enough. Colorado State University Extension calls air drying the cheapest method but the least consistent.⁸

Temperature. NCHFP says to preheat to 95 to 115°F, and up to 125°F in humid areas.⁴ Penn State says you can dry herbs in a dehydrator if it can be set between 95 and 110°F.
Time. NCHFP gives 1 to 4 hours. Check now and then.⁴
Layout. Lay the stems on the trays so they don’t touch, and don’t dry herbs with fruits or vegetables, since the flavors can mix.¹

Oven

Penn State generally doesn’t recommend the oven, because even the lowest setting destroys much of the flavor. If you use it anyway, Penn State says to use the lowest temperature, no higher than 180°F, for 3 to 4 hours with the door open.¹ NCHFP’s alternative is a very cool oven: the light of an electric oven, or a gas pilot light, can give enough heat to dry herbs overnight.⁴

The sage research shows why heat is a problem. In the 2012 study, oven drying at 65°C (149°F) gave the least essential oil of any method tested, while oven drying at 45°C (113°F) was among the methods that lost only a little.² Penn State’s ceiling of 180°F is 82°C, hotter than both.

You’ll see short oven methods recommended, like heating for 15 minutes and then switching off, or drying for half an hour with the door cracked. We found no tested source for those times.

Microwave

Every source treats the microwave as a method for small amounts, and they don’t agree on timing:

Source	Method
Penn State Extension¹	Leaves between paper towels; high power for 2 to 3 minutes per cup. Start with 1 minute and stir every 30 seconds. A 1,000-watt or stronger oven may heat too fast.
Colorado State University Extension⁸	Leaves between two paper towels, with ½ cup of water in a cup beside the plate; stop every 15 seconds to check and turn.
America’s Test Kitchen⁹	Washed, dried herbs on a paper towel for 30 to 40 seconds.
NCHFP⁴	Calls it fast for small quantities; gives no times.

Wattage varies, so work in short bursts and check often. Penn State warns that paper towels can catch fire if there isn’t enough herb on them.¹ None of our sources recommends drying straight on the turntable without paper towels.

How to tell when sage is dry

The leaves are dry when they’re crispy and crumble easily between your fingers, and the stems break when you bend them. Make sure they’re completely dry before you store them, or they can mold.¹

Storing dried sage

Question	What the sources say
Whole or crumbled?	Whole herbs keep their flavor longer.⁸⁶ Commercial practice separates the leaves from the stems after drying;⁵ crumble or rub them when you cook.
Container	Airtight, kept in a cool, dry, dark place.⁴ Colorado State suggests ceramic jars or darkened glass to block light.⁸
Label	Label and date the jar.³
How long	“Up to a year” for most dried herbs (Penn State);¹ up to 3 months for herbs dried in the microwave (ATK).⁹
Fridge or freezer?	Possible in freezer jars, but take care moving them back to a warm room so condensation does not form.⁶

Those are numbers for dried herbs in general, not sage. Sage keeps losing volatile oil after drying,⁵ so trust your nose: if a crushed leaf smells faint, the dish will taste faint.

Cooking with dried sage

Dried sage holds up better than most dried herbs. In ATK’s tests, dried sage, rosemary and thyme did reasonably well in dishes cooked for more than 20 minutes with a good amount of liquid.¹⁰ Its classic uses include sausages, stuffings, soups and canned vegetables. Drying does change how it smells, though. In the 2012 study, camphor’s share of the oil went up with every drying method.² For how much dried sage replaces fresh (the published conversions disagree), see fresh sage vs dried sage.

Not yet measured

How long sage takes to air dry in a home kitchen.
How long home-dried sage keeps its flavor, measured on sage rather than dried herbs in general.
How a home microwave affects sage’s flavor compared with air drying.

Let’s Preserve: Drying Herbs, Penn State Extension. extension.psu.edu · Reference work ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹²
Hamrouni Sellami et al., Food and Bioprocess Technology, 2012. humboldt-reloaded.uni-hohenheim.de · Peer-reviewed ↩ ↩² ↩³ ↩⁴ ↩⁵
Dry Your Own Herbs and Spices, America’s Test Kitchen. americastestkitchen.com · Publication ↩ ↩² ↩³ ↩⁴ ↩⁵
Herbs (Drying), National Center for Home Food Preservation. nchfp.uga.edu · Reference work ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷
Salvia officinalis (PROSEA), Plant Resources of South-East Asia. uses.plantnet-project.org · Reference work ↩ ↩² ↩³ ↩⁴
Preserving Herbs by Drying, Penn State Extension. extension.psu.edu · Reference work ↩ ↩² ↩³
Venskutonis, Food Chemistry, 1997 (abstract). agris.fao.org · Peer-reviewed ↩
Herbs: Preserving and Using, Fact Sheet 9.335, Colorado State University Extension. ccfruitandnuts.ucanr.edu · Reference work ↩ ↩² ↩³ ↩⁴
When You Should Actually Use Dried Herbs, America’s Test Kitchen. americastestkitchen.com · Publication ↩ ↩²
Science: Substituting Dried Herbs for Fresh, America’s Test Kitchen. americastestkitchen.com · Publication ↩

How to Dry Sage: Air, Dehydrator, Oven and Microwave, With the Temperatures That Matter