How to Dry Dill Leaves and Seed

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Dill is a delicate herb, and the extension guides do not agree on the best way to preserve its leaves. Some list dill among herbs that air-dry well, while others describe it as a more delicate herb that freezing may suit better. Dill seed is a different matter: several extension publications describe a simple drying method for the seed heads. This guide explains how to dry dill leaves and seed at home, using the publications listed at the end, and notes where those sources differ.

Quick answer

Harvest dill early in the morning, and cut it before the flowers open if you are drying the leaves.
For leaves, extension sources describe drying in small bundles or on trays, with a dehydrator set between 95 and 110°F as one option.
For seed, let the seed heads mature on the plant, hang the stalks upside down, and shake the seeds out once they are dry.
Store dried dill in an airtight container in a cool, dry, dark place. The guides do not agree on a single shelf life, so label each batch and check the aroma.

Why dill is harder to dry than thyme or rosemary

Dill is often described as a more delicate herb than thyme or rosemary. The Ohio State University Extension fact sheet describes drying as used for more delicate herbs like dill, while freezing is used for more hearty herbs such as thyme and rosemary. That statement suggests that dill leaves may hold up better in the freezer than in a hanging bundle.

The Wisconsin Extension drying guide takes a different view. It lists dill among the herbs well suited to air drying, along with thyme, summer savory, bay leaves, oregano, rosemary, and marjoram. Because the sources differ, this guide describes the methods the sources support and does not claim that one method is best for every batch of dill.

Harvesting dill for drying

Timing the harvest affects both flavor and how well the leaves dry. The Ohio State fact sheet recommends gathering herbs early in the morning, and it says the best time to harvest herbs for drying is just before the flowers open, when they are in the bursting stage. Wisconsin Extension suggests harvesting most herbs for drying in mid-morning, when the leaves are dry but before the sun is hot.

Cut the stems rather than individual leaves, and leave healthy growth on the plant. Remove any yellow, bruised, or damaged leaves before drying. The Purdue guide advises rinsing stems in cool water, shaking off the excess, and patting them dry with a paper towel or using a salad spinner. Dill that is wet when it goes into a drying setup is more likely to mold or dry unevenly, so dry it thoroughly first.

Air drying dill leaves

The Wisconsin method for air-dried herbs is to tie washed stems into small bundles of 5 to 6 stems and hang them upside down in a warm, dry, well-ventilated area out of direct sunlight until the moisture is removed. The guide gives a warm range of 70 to 80°F. Check the leaves often, since the sources do not give a dill-specific drying time.

A practical routine for dill leaves looks like this:

Rinse and pat the stems dry, then remove any damaged leaves.
Tie 5 or 6 stems into a small bundle so that air can reach the leaves.
Hang the bundle upside down in a warm, dry room away from the sink, stove, and dishwasher.
Check the leaves each day. They are ready when they feel crisp and crumble easily between the fingers.

The Tennessee guide recommends hanging herbs in a paper bag punched with holes, which keeps dust off while allowing air to move through the bag. The guide does not give a dill-specific drying time.

Using a dehydrator or low oven

Purdue Extension describes a dehydrator method for herbs. It advises setting the dehydrator between 95 and 110°F, placing stems on the drying trays so they do not touch, and drying larger leaves separately. It also recommends not drying herbs together with fruits or vegetables, because the flavors may mix and the moisture contents are different. Purdue’s oven method uses the lowest temperature available, not above 180°F, for 3 to 4 hours with the oven door open, and notes that the oven light in some ovens may provide enough heat.

Oven drying can reduce color, so check the leaves often. The Tennessee guide describes drying herbs in a very cool oven, with the oven light on to provide a little overnight heat. If you want a closer look at the low-heat approach, the guide on how to dry herbs in the oven covers the general method.

Harvesting and drying dill seed

Dill seed is the most clearly described drying process in these sources. If you are starting dill from scratch, how to grow dill from seed covers sowing and early care. Purdue explains that the seeds of dill, caraway, mustard, and fennel can be left on the plant until mature. Cut the flower stalks, or pull the entire plant from the ground, hang it upside down, and shake the seeds out when they are dry. Examine the seeds for insects, remove husks by rubbing the seeds between the hands, and blow away the chaff.

Purdue also notes that dill seed can stand in for fresh dill in some recipes. Two to three teaspoons of dill seed or dill weed provide the flavor of one head of fresh dill, according to the guide. Seed kept for planting should be handled differently from seed kept for cooking, and the Tennessee guide notes that heating should be avoided if you plan to save seed for planting.

Treating dried dill for insects

Air-dried herbs and seeds can carry insects or eggs. The Tennessee Extension guide recommends heating dried herbs and seeds at 160°F for 30 minutes to kill insects and eggs, and it notes that this can reduce flavor. It also describes freezing the dried herbs and seeds at 0°F or lower for at least 48 hours as an option for better flavor. Use these steps as the published procedure describes them, and check local extension guidance if you have questions about a particular method.

Storing dried dill

Store dried dill leaves and seed in airtight containers in a cool, dry, dark place. Purdue advises keeping them in cupboards or drawers away from stoves and sinks. Purdue also notes that whole herbs hold their oils and flavor longer than crushed ones. Crush dill leaves or seeds only as you need them.

Purdue states that most dried herbs keep well for up to a year and that aroma is the best guide to strength. Label each container with the date, and replace any batch that has lost its scent.

Using dried dill

Dried dill can be used in cooked dishes and dressings, and this guide does not give recipes or pickling instructions. The sources reviewed do not give a dill-specific conversion from dried to fresh, so start with a small amount and adjust to taste.

Common problems and how to avoid them

Mold is the main risk when drying dill. Wet stems, large bundles, and humid rooms all increase that risk. Pat the stems dry, use small bundles, and move the drying herbs to a drier spot if they stay soft after several days.

If the leaves turn brown or lose their aroma, they may have dried in direct sun or in too much heat. Move future bundles to a shaded area with good airflow, and harvest at the recommended time of day.

How we chose

The sources in this guide were selected because they are non-retail university extension publications that address drying dill or sturdy herbs directly. The Wisconsin, Ohio State, Purdue, and Tennessee pages were opened and checked for the harvest, drying, seed, insect treatment, and storage statements used here. Retail and general lifestyle pages were not used as the basis for any claim.

What we could not verify

The main point of disagreement is whether dill leaves are better air-dried or frozen. Ohio State describes drying as suited to delicate herbs like dill, while Wisconsin lists dill among herbs well suited to air drying. This guide reports both positions and does not choose between them for every kitchen.

What the sources do not say

The sources reviewed do not give a fixed drying time for dill leaves, do not name a home humidity level, and do not describe a tested shelf life specific to dill. They also do not provide a complete pickling or canning method that uses dried dill. Any statement about how long dried dill keeps its best flavor should be read as general guidance rather than a measured result.

Frequently asked questions

Can I air dry dill leaves?

Wisconsin Extension lists dill among the herbs well suited to air drying. Ohio State describes drying as the method for delicate herbs like dill and suggests freezing for hardier herbs, so the sources are not in full agreement. Small bundles in a dry, ventilated room are the approach the Wisconsin guide describes.

How do I dry dill seed?

Let the seed heads mature on the plant, then cut the flower stalks or pull the plant and hang it upside down. Once the seeds are dry, shake them out, check for insects, and remove the chaff, according to the Purdue guide.

What temperature should I use in a dehydrator for dill?

Purdue Extension recommends setting a dehydrator between 95 and 110°F for herbs, with stems placed on trays so they do not touch.

Can I use dried dill seed instead of fresh dill?

Purdue states that dill seed or dill weed can substitute for fresh dill in some recipes, with two to three teaspoons providing the flavor of one head of fresh dill. Adjust to taste, since dried seed is more intense.

How long does dried dill keep?

Purdue notes that most dried herbs keep well for up to a year and that aroma is the best guide to strength. The sources reviewed do not give a tested shelf life for dill, so check the scent before using an older batch.

Sources

University of Wisconsin-Madison Extension Master Gardener, “Drying Herbs,” https://mastergardener.extension.wisc.edu/files/2015/12/drying-herbs.pdf (opened 2026-10-27)
Ohio State University Extension, “Preserving Herbs” fact sheet HYG-5360, https://ohioline.osu.edu/sites/ohioline/files/imce/Family_and_Consumer_Sciences/HYG-5360-PreservingHerbs.pdf (opened 2026-10-27)
Purdue Extension, “Let’s Preserve: Drying Herbs,” https://www.extension.purdue.edu/county/floyd/hhs/hhs-education-papers/drying-herbs.pdf (opened 2026-10-27)
University of Tennessee Extension, “Drying Herbs,” https://lawrence.tennessee.edu/wp-content/uploads/sites/116/2023/06/Drying-Herbs.pdf (opened 2026-10-27)