How to Grow Broccoli Microgreens (The Farmers Market Bestseller)

Last updated: 11.07.2026.

Broccoli microgreens are the health crowd’s darling, and that makes them the single strongest seller at farmers markets. Mild, fresh, and famous for a compound called sulforaphane that gets endless attention in wellness media, they fly off a market table to health-conscious shoppers. They are also easy to grow and rank among the most profitable microgreens to grow for direct-to-consumer sellers. Here is how to grow a clean, even tray, plus the one watering quirk to know about.

What you need

• Broccoli microgreen seeds. Organic certification genuinely helps for the health-market positioning. A bag of organic broccoli microgreen seeds is cheap and tiny seeds go a long way.
• 10 by 20 inch (25 by 50 cm) trays, holed and solid.
• A fine, level growing medium.
• Light: a bright window or a grow light.
• For selling: 2 oz clamshells and printable labels.

The one quirk: tiny seeds and gentle watering

Broccoli seeds are very small, and like other brassica seeds they form a slightly gel-like coating when wet. Two things follow from that:

No soak. Small seeds germinate fine dry. Do not soak them.

Water gently, from below. Because the seeds and young shoots are delicate, heavy top-watering can dislodge them and invite mold. Bottom-water once they are established. This gentle touch is the main thing that separates a clean broccoli tray from a moldy one.

Step by step

1. Fill the tray with about an inch (2 to 3 cm) of moist, finely leveled medium. A smooth surface matters more for tiny seeds.

2. Sow densely and evenly. Scatter the dry seeds in a fine, even layer. They are small, so a little goes a surprisingly long way.

3. Mist and blackout. Mist lightly, cover with an inverted tray, and keep dark for 3 to 4 days, misting gently if the surface dries.

4. Uncover and light. When the shoots lift the cover, uncover and give bright light. They green up into a fine, even carpet.

5. Bottom-water from here to keep the delicate foliage dry.

6. Harvest at 8 to 12 days, once the first true leaves appear. Cut at the base with clean scissors.

Common problems

• Mold (white fuzz on the medium): the most common broccoli issue, usually from top-watering or overcrowding. Bottom-water, ease off moisture, and add airflow. Remember fuzzy white root hairs are normal.
• Seeds washing into clumps: you top-watered too hard, or the surface was uneven. Level the medium and water gently until established.
• Uneven, thin patches: sow a little more densely and evenly next time.
• Leggy shoots: more light after the blackout.

Harvest, storage, and yield

Broccoli yields roughly 0.8 to 1.0 lb (about 360 to 450 g) per tray and stores about a week refrigerated in a breathable container. Its mild, fresh flavor and fine texture make it an easy sell to shoppers who might find spicier greens like radish too strong.

Selling broccoli microgreens

This is your farmers market champion. Health-conscious shoppers actively seek broccoli microgreens out and pay a premium by the 2 oz clamshell, and it is the strongest direct-to-consumer variety on the whole list. Organic positioning matters here, so buy organic seed and say so on the label. It rounds out the four-variety starter lineup with sunflower, pea shoots, and radish, and you can see how its economics compare in our profitable microgreens breakdown. The farmers market selling guide covers booth setup and pricing, which is where broccoli shines.

Broccoli is the microgreen that turns market shoppers into regulars. Sow the tiny seeds evenly, water gently from below, and lean on the organic health angle when you sell. Grow it alongside a spicier variety like radish so your table offers both mild and bold, and use the step-by-step business guide to turn a few trays into a steady weekend income.