Updated November 3, 2026
From late summer into fall, dahlia farms across northwest Washington open their fields for u-pick, fill self-serve flower stands, and sell buckets of blooms by the stem. Dahlias are one of the most rewarding cut flowers there is, if you know a couple of tricks.
Dahlias in our area usually start blooming in late July and keep producing until the first hard frost, which typically arrives in October or November. August and September are the heart of the season, with the most varieties open at once. Plants that are picked often keep making more flowers, so a farm's field can look full for weeks.
Hours and u-pick days vary a lot between farms, and some open only for special evenings or by appointment. Check the farm's website or social media before you go.
Unlike roses or tulips, dahlias don't keep opening after they're cut. Pick blooms that are fully open, or nearly so, at the size and shape you want. Look at the back of the flower. The outer petals should be firm and fresh, not papery or drooping, since those flowers are already past their best.
Leave buds alone. A tight dahlia bud won't open in a vase.
The best time to cut is in the cool of the morning, after the dew dries, or in the evening once the heat has passed, because stems are most hydrated then. Flowers cut in afternoon heat often wilt within a few days.
Cut a long stem, just above a pair of leaves, so the plant can branch and make new flowers. Get stems into water right away. Bring a bucket with a few inches of water if the farm doesn't provide one, and keep your flowers out of a hot car.
At home, recut each stem and strip any leaves that would sit below the waterline. Use a clean vase with fresh room-temperature water, and change the water every day or two. Keep the vase out of direct sun and away from ripening fruit.
With good care, cut dahlias usually last about five to seven days, sometimes a little longer.
Every farm runs things a little differently, so follow the posted rules on where to pick and how to pay. Some provide snips and buckets, and others ask you to bring your own. Honor-system stands rely on trust, so bring cash or have the farm's payment app ready.
Fall in love with a variety? Ask the farm whether it sells tubers. Many do, and our guide to dahlia tuber sales explains how to get them.