Broccoli Seeds for Sprouting & Microgreens | Waltham 29 Vari

The Verdict

If you’ve ever stared at a $12 clamshell of broccoli microgreens at the grocery store and thought, “I could grow this myself,” you’re right. And this is the seed to do it with.

Waltham 29 is the workhorse variety of the broccoli world — a cold-hardy heirloom that’s been around since the 1950s, bred for open-pollinated reliability rather than shelf-life gimmicks. This particular listing from a specialty sprouting company packages it specifically for indoor growing, which matters more than you’d think.

What You Actually Get

A 4-ounce (113g) stand-up pouch of seed. That’s roughly 2.5 to 3 tablespoons of seed per ounce, which translates to about 8-10 full trays of microgreens or countless jars of sprouts. The seeds are untreated, non-GMO, and tested for germination before packing — a detail the company highlights, and one that shows in the results.

The seeds themselves are small, dark brown, and uniform in size. No chaff, no broken pieces, no random weed seeds mixed in. That’s rarer than it should be in the sprouting seed world, and it directly impacts your success rate.

Germination and Performance

Here’s where this product earns its keep. I’ve sprouted broccoli seeds from three different brands over the past year, and this one consistently pops within 36-48 hours. The germination rate is genuinely impressive — one Amazon reviewer noted, “I’ve grown three batches now and every single one has sprouted. Not a single dud seed in the bag.” Another mentioned, “These sprout faster than any other brand I’ve tried. Day 2 and they’re already showing tails.”

For microgreens, the seeds perform equally well. The Waltham 29 genetics produce sturdy, uniform seedlings that stand upright without the leggy, weak growth you sometimes get from cheaper seed stock. The flavor is classic broccoli — mild, slightly sweet, with that fresh green bite that makes microgreens worth the effort. It’s not spicy like radish or mustard, which makes it a safe choice for salads, sandwiches, and smoothies.

What Buyers Consistently Praise

The overwhelming theme across the 229 ratings is reliability. Over and over, buyers mention that this seed “just works.” One reviewer summed it up: “I’ve been sprouting for years and this is the most consistent seed I’ve bought. High germination, no mold issues, great flavor.” The clean seed stock deserves credit here — fewer hulls and debris means less surface area for mold to take hold during the sprouting process.

Another recurring positive is the value. At 4 ounces, this bag lasts a while. For sprouts, you only need about 2 tablespoons per quart jar. For microgreens, a 10x20 tray takes about 1.5 ounces. So you’re looking at roughly 8 trays or dozens of sprout harvests from a single bag.

Where It Falls Short

No product is perfect, and this one has two honest drawbacks.

First, the hulls. Broccoli seeds have notoriously stubborn seed coats that cling to the cotyledons of young microgreens. You’ll need to spend a few extra minutes rinsing and picking hulls off your harvest, especially if you’re growing them to the microgreen stage. Sprouts are less affected, but for microgreens, budget some cleanup time.

Second, the packaging. The stand-up pouch doesn’t have a resealable zipper. Once you open it, you’ll want to transfer the remaining seeds to an airtight jar or bag. It’s not a dealbreaker, but it’s an annoying oversight that could affect seed viability if you’re a slow grower. Store them in a cool, dark place and they’ll stay viable for a year or more.

Who Should Buy This

The home sprouting beginner. If you’re just starting out, this seed’s reliability removes the biggest variable in your success. You can focus on technique without worrying about whether your seed stock is sabotaging you.

The microgreen enthusiast. The uniform germination and sturdy growth make this ideal for tray growing. You’ll get consistent, beautiful harvests that look as good as anything from a specialty grower.

The health-conscious budget shopper. At roughly $10-12 per bag, this pays for itself in two grocery-store microgreen purchases. The sulforaphane content in broccoli sprouts is a well-documented health bonus.

Skip it if you’re looking for a spicy, peppery flavor profile — that’s radish or mustard territory. Also skip if you want a resealable bag; this isn’t it.

FAQ

Q: How long do these seeds stay viable? A: Stored properly in a cool, dry place, broccoli seeds maintain high germination for 2-3 years. After opening, transfer to an airtight container and use within a year for best results.

Q: Can I grow these outdoors in my garden? A: Yes, Waltham 29 is a full-size broccoli variety bred for cold climates. You can grow mature heads in about 65-75 days, but this is primarily packaged for sprouting and microgreens, so don’t expect a garden-scale packet.

Q: Do I need special equipment to sprout these? A: No. A mason jar with a mesh lid or a basic sprouting tray works fine. No grow lights needed for sprouts — just rinse and drain twice daily. For microgreens, a sunny windowsill or basic grow light will do.

The Verdict

4.6/5 stars

Buy it if you want reliable, high-germination broccoli seeds that work equally well for sprouts and microgreens. The clean stock, proven variety, and consistent performance make this the easy recommendation for anyone serious about growing their own nutrient-dense greens.

Skip it if you can’t tolerate a little hull-picking at harvest time, or if you need resealable packaging. Otherwise, this is the seed you’ll keep coming back to.

Where to Buy

👉 Check Price on Amazon →

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.