Mustard Season in Sonoma: When It Blooms and Where to See It

Mustard season in Sonoma is the stretch of late winter when yellow flowers fill the ground between the vine rows. It turns the bare, quiet months of the year into the most colorful ones. If you've seen the photos and wondered when to go, and whether a balloon is the right way to see it, here's what we know.

The short version: plan on late January through early March, aim for February, and book a sunrise flight on a weekday if you can. The rest of this guide covers why the mustard is there, what it looks like from the basket, and how to plan around the weather.

When is mustard season in Sonoma?

Late January through early March is the window that local sources keep landing on. Fairmont Sonoma describes the flowers blanketing the valley floor from late January through early March. Sonoma County's tourism board and Sonoma Magazine both name February and March as the time to look. Visit Napa Valley puts the peak around mid-February. Those aren't contradictions. They're the same bloom described from different ends.

The timing isn't fixed, because the weather decides it. Sonoma County Winegrowers notes that most mustard blooms just after a hearty rain. A wet winter tends to mean a fuller show. A dry one can leave the bloom patchy or late. Nobody can give you a guaranteed date a year out, and anyone who does is guessing.

What you can count on is the pattern: the first yellow shows up in the final weeks of January, it builds through February, and by March the vineyards are starting to wake up and the show is winding down.

Why is there mustard growing between the vines?

It's not a wildflower accident. Mustard is a winter cover crop, and growers use it on purpose. According to Sonoma County Winegrowers, it helps prevent erosion, suppresses weeds and soil-borne pests, and eases soil compaction. The yellow flowers are a bonus.

The bloom also has an end date. When the vines wake up in spring at bud break, growers turn the mustard back into the soil as mulch. That's why the show is a late-winter one and not a summer one.

It also means a caveat. Not every vineyard plants mustard, and not every block that does will be in full flower on the same morning. Think of it as a good chance, not a promise. On a morning when the bloom is thin, you still get green hills, dark pruned vines and a valley with almost nobody on the roads.

What mustard season looks like from a balloon

From the ground, mustard comes one vineyard at a time. From a few hundred feet up, you see the pattern. Yellow stripes run between dark rows of pruned vines, the hills behind them are green from winter rain, and the whole valley reads like a quilt.

Carneros, where we fly, is a good place for it. Sonoma County's tourism board points out that Carneros has a cooler climate than the rest of the county, which it calls perfect for Pinot Noir and mustard flowers. Our flights run over Sonoma Valley and Carneros, with Napa views on the right wind. You can read more about where we fly.

One honest note on light. Fairmont Sonoma says mustard glows most vividly at golden hour, and that morning light gives a gentler version: quiet, pastel and serene. We only fly at sunrise, so you're getting the gentle version. In February the sun comes up between about 7:14 a.m. on the 1st and 6:42 a.m. on the 28th, according to WeatherSpark's figures for Sonoma. It's low, soft light, and the yellow still shows. It just doesn't shout.

A flight lasts 45 to 60 minutes and ends with a champagne toast, so the whole thing is done and you're in a tasting room or a breakfast spot by mid-morning.

Where to see the mustard from the ground

You'll want a ground-level look too, and there are good places to get one. Sonoma County's tourism board and Sonoma Magazine both list these in the Sonoma Valley and Carneros area:

• B.R. Cohn Winery, Glen Ellen. Its hillside along Highway 12 is known locally as the “mustard flower hill.”
• Kunde Family Winery, Kenwood. Mustard surrounds the property in February and March.
• Gloria Ferrer Caves & Vineyards, Carneros. The terrace looks out over mustard-covered vineyards, which makes it the easiest place to sit down with a glass and watch.

Two rules from the local guides are worth repeating. Respect private property, because most of the fields you'll drive past are working vineyards. And keep your eyes on the road along Highway 12. If you want a photo, pull into a winery rather than stopping on the shoulder.

What February weather means for your flight

Winter flying is different from summer flying, and it's worth knowing before you book. In February, Sonoma's daily highs run about 59°F to 62°F and lows about 40°F to 43°F. The chance of a wet day sits around 29 to 31 percent, and the sky is overcast or mostly cloudy a little more than half the time, per WeatherSpark.

That has three practical effects:

• Weather is the pilot's call. The go/no-go decision is made the morning of the flight, based on wind and conditions. If it isn't safe, we don't fly. We'll call or text you the evening before to confirm.
• A weather cancellation doesn't cost you. Our cancellation policy covers it, and we'll work to reschedule you. Keep a second morning open if you can.
• Dress for the airfield, not the basket. It's coldest on the ground before sunrise and warmer once the burners are running. Our winter ballooning guide has the layering list.

The best mornings to fly during mustard season

Join-in flights are $265 per person Monday through Thursday and $285 Friday through Sunday. Mustard season has a few easy ways to use that.

Late January: the early bloom

You'll catch the first yellow, not the full carpet. Martin Luther King Jr. Day, Monday, January 18, 2027, flies at the weekday rate, and it's the same weekend as Winter WINEland. We wrote up that plan in Sonoma in January.

Mid-February: your best odds

This is when the sources agree the bloom is at its strongest. February 2027 has 16 Monday–Thursday mornings at $265, and Presidents' Day, Monday, February 15, is one of the cheapest long weekends of the year to fly. If you're coming for Valentine's Day, read our Valentine's Day in Sonoma guide.

Early March: the tail end

The bloom is fading as the vines wake up, but the hills are at their greenest. If you miss the peak, spring in April and May is the next good chapter.

A practical tip: book for a weekday and keep the following morning loose. If a storm pushes your first date, a clear morning after a front is often the best of the week.

Shared basket or private flight?

The view is the same either way. The difference is who's in the basket.

• Join-in flight ($265–$285 per person) shares the balloon with other guests. It's the right choice if the goal is the mustard and the sunrise.
• Private VIP for two ($1,500) gives you the whole basket and pilot. Good for a proposal, an anniversary, or anyone nervous about heights. Here's the VIP flight for two. Bringing another couple or a small family? The VIP for 3–4 is $2,200.
• Groups can fill a balloon or several. If you're planning a winter team outing or a family weekend, request a group quote.

The packages page lays all of it side by side.

Quick answers

• Will I definitely see mustard on my flight? No. It depends on the winter's rain, the date and which vineyards we're over. Mid-February gives you the best odds.
• Where do we check in? Sonoma Skypark, 21870 8th St E, Sonoma, CA 95476, before sunrise. The pre-flight page has what to bring.
• How far is it from San Francisco? About 45 minutes from the Golden Gate Bridge.
• Who can fly? Guests must be at least 8 years old and 57 inches tall. Every flight is piloted by an FAA-certified pilot.
• Anything else? Our FAQ covers the rest.

Plan around the bloom, not the calendar

Mustard season in Sonoma is short, it's driven by the rain, and it's the best-kept secret of the off-season. Pick a mid-February weekday, keep a backup morning, and bring layers. If you'd like help choosing a date, call us at 707-819-9223. With more than 2,300 five-star Google reviews behind us, we'll tell you plainly what to expect.