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Harvest Calendar for Cut Flowers

Cut flowers are picked at a specific stage, not on a date, and that stage differs from one flower to the next.

What does a cut flower harvest calendar need to show?

For each flower, note the first bloom date, the length of the picking window, and the stage at which stems should be cut. Some flowers are cut as tight buds, and others are cut when fully open. Extension sources agree that the right stage depends on the species, so one rule will not cover a mixed planting.

Add a column for repeat harvests. Many cut flowers are cut-and-come-again, and regular cutting encourages more stems.

What time of day is best for cutting?

Iowa State University Extension recommends early morning, when flowers are most fully hydrated. Bring a clean bucket of water into the garden and place stems in it right away rather than carrying a bare bundle back to the house.

Cut cleanly with sharp, clean shears so stems are not crushed. Strip leaves that would sit below the waterline, since they foul the water.

How do you judge the right stage for each flower?

Learn each flower's cue and write it in the calendar. Some are ready when buds show color but have not opened. Others are ready when the flower is fully open or a certain number of florets have opened on the spike. Your extension office or a cut flower grower's guide can give you the cue for each species you grow.

Test with a few stems first. Cut at different stages, hold them in water, and note which last longest. A season of simple trials gives you a calendar based on your own varieties.

How should stems be handled after cutting?

Keep stems cool and in water. Iowa State describes short-term storage in a cool place or refrigerator and suggests clean water with a commercial floral preservative. Some stems with milky sap or woody stems need special treatment, and the extension page above explains common methods.

Clean buckets matter. Dirty containers shorten vase life more than most growers expect.

How do you stretch the season?

Plan successive sowings of annuals, and mix early, mid and late varieties. Include perennials, flowering shrubs and foliage so that something is always ready. Use your last spring frost and first fall frost to set the outer edges, and protect plantings with cover if a cold night is forecast.

If you sell flowers, check any local rules and market requirements. Keep records of what sold well so next year's calendar reflects demand.

Questions about pests, disease or sprays belong with your extension office. Follow every label and protect pollinators on flowering plants.

Can an example show the idea?

Suppose you grow zinnias, sunflowers, snapdragons and dahlias. Zinnias bloom soon after planting and keep going with regular cutting. Sunflowers come in a single flush unless you plant in succession. Snapdragons are cut as spikes when a portion of the florets have opened. Dahlias bloom from mid-summer until frost and are cut when blooms are open.

Four crops, four stage rules, four different windows. Writing them in a table lets you see overlaps and gaps. If a gap appears in late summer, you can plan an extra planting or add a flower that fills it. This is an example for planning, and your climate and varieties will change the details.

What equipment and routines help?

A few clean buckets, sharp snips, a shaded place to hold stems and a regular cutting routine do more for quality than any fancy gear. Plan cutting in the cool part of the day, and avoid leaving buckets in the sun.

If you plan to sell, write a short harvest checklist for helpers so everyone cuts the same stage and handles stems the same way. Consistency is a selling point for florists and market customers.

Keep a simple log of first cut, last cut and any weather that hurt a planting, such as a hard rain or an early frost. Notes like these turn into a calendar that fits your site within a couple of seasons, and they help you decide what to plant more of next year.

Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.

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