Cooking with Fresh Garden Herbs

A handful of herbs from your own plants can lift a dish, but fresh herbs are not interchangeable: a sprig of rosemary and a fistful of basil want to be treated differently. Get the timing right and you keep the flavour.

Part of our Garden & Kitchen series - what to do with a harvest once it’s bigger than tonight’s dinner.

This guide follows the University of Illinois Extension and Iowa State University Extension’s Spend Smart Eat Smart guide to fresh herbs.

The one distinction that matters: hardy vs tender

• Hardy herbs - Iowa State names rosemary, bay, thyme and sage; the University of Illinois names thyme, rosemary and tarragon. They can take some heat.
• Tender herbs - Iowa State names basil, cilantro, chives, parsley and dill; the University of Illinois names basil, cilantro, dill, parsley and marjoram.

The University of Illinois explains why timing matters: fresh herbs lose flavour and aroma the longer they are exposed to heat.

When to add each one

Hardy herbs - earlier. Iowa State says hard herbs can go in toward the beginning of cooking; the University of Illinois says hardier herbs can be added in the last 20-30 minutes without losing flavour. Either way, they can handle a simmer that would ruin basil.

Tender herbs - at the end. Iowa State says soft herbs should go in toward the end of cooking or after cooking for the best flavour; the University of Illinois says the delicate herbs are best added in the last few minutes or sprinkled on top.

Preparing herbs

The University of Illinois suggests:

• Wash just before use, under running water; shake off the moisture and pat dry with a paper towel.
• Cut, tear or chop to bring out the flavour. Iowa State adds that the more finely herbs are chopped, the more oils are released and the more fragrant they become.
• Strip sturdy herbs such as rosemary, oregano, sage and thyme by running your fingers from the top of the stem to the bottom.
• Use some stems of tender herbs such as parsley and cilantro, which carry flavour and aroma too.
• Start with less. It is easier to add more than to take some out.

If you are swapping fresh herbs for dried, Iowa State’s rule of thumb is 1 tablespoon fresh = 1 teaspoon dried = 1/4 teaspoon powdered.

Harvesting without harming the plant

• Harvest early in the morning, after the dew has dried, and handle the herbs gently to avoid bruising them (Iowa State).
• Pick only what you need unless you plan to dry or freeze it: flavour and aroma decline quickly after picking (Iowa State).
• Pick basil shoot tips regularly. The Royal Horticultural Society says this keeps basil bushy and productive.
• Snip chives regularly to keep fresh leaves coming (RHS).

Keeping cut herbs fresh

• Stand them in water. Iowa State suggests trimming the stems, standing them in a glass with an inch of water, covering loosely with a plastic bag and keeping them in the fridge, changing the water daily; stored like this they may last up to a week. The University of Illinois suggests snipping the ends diagonally and covering the glass with plastic wrap.
• Keep basil out of the fridge. The University of Illinois says basil should not be stored in the refrigerator.
• Freeze a glut. If you won’t use herbs within a week, the University of Illinois suggests freezing them: put chopped herbs in clean ice cube trays, cover with water and freeze, then move the cubes to a freezer-safe container. Frozen herbs keep best for four to six months.

For drying and storing herbs through winter, see our companion guide on drying and preserving the harvest.

The short version

Hardy herbs such as rosemary, thyme and sage can go in early; tender herbs such as basil, parsley, cilantro and dill go in at the end or on top. Wash herbs just before use, pick in the morning, keep cut stems in water (basil out of the fridge), and freeze what you can’t use within a week.

If you are still building your herb patch, we have growing guides for rosemary, thyme, sage and basil, plus the rest of the herbs worth growing at home.

Sources

• University of Illinois Extension, Using Fresh Herbs in the Kitchen. Read 28 October 2026.
• Iowa State University Extension and Outreach, Spend Smart Eat Smart, Fresh Herbs. Read 28 October 2026.
• Royal Horticultural Society, How to grow basil and How to grow chives. Read 28 October 2026.

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