MICROGREEN BUSINESS GUIDE · SOUTH SAN FRANCISCO, CA

Start a microgreen business in South San Francisco, CA.

Most South San Francisco kitchens serving microgreens are split between out-of-town distributors and a handful of local growers stretched thin. The restaurants serving the lunch traffic of the East Grand corridor and the Grand Avenue downtown still rely on distributor supply for delicate greens. The South San Francisco grower who steps in first owns the lunch market.

Quick Answer

You can start a microgreen business in South San Francisco with under $400 in initial equipment and grow it into a $2,800 to $7,500 per month side income within 90 days. Here is the local demand picture, the unit economics at South San Francisco wholesale prices, and the operating system used by working microgreen farms.

How many of the cafes and lunch spots feeding the biotech corridor right now are serving microgreens that came from anywhere inside San Mateo County?

What South San Francisco buys today

South San Francisco is anchored by one of the densest biotech employment corridors in the world, with a daytime lunch volume that punches far above the city's residential population. The Grand Avenue downtown adds a steady evening dining base, and the supply chain for delicate produce has not kept pace with the food evolution around the East Grand corridor.

The weekend farmers markets in the broader north Peninsula pull a steady, willing-to-pay buyer base. The juice and wellness culture serving the biotech workforce layers in steady direct-to-consumer demand, and the natural grocery channel rounds out the buyer mix.

For indoor growing, the coastal climate is unusually friendly. Mild year-round temperatures hold a garage or spare-room grow space inside the productive window with minimal intervention, keeping electricity costs predictable.

Every month you wait, another cafe along East Grand or Grand Avenue signs a 12-month supply agreement with a distributor outside the area. What does that cost you over the next two years?

The math, in South San Francisco prices

South San Francisco sits in the mid to upper tier of California wholesale pricing, with biotech corridor and downtown accounts paying a real premium for genuinely local cut-to-order trays. Here is what the unit economics look like at conservative South San Francisco numbers.

Startup cost

$400

Trays, soil, seed, lights. Used gear cuts this in half.

Per-tray net

$20-$30

After seed, soil, packaging, delivery.

Trays per week

100

Target for $3K-$5K/mo at South San Francisco pricing.

Break-even week

Week 4

First positive cash week. Most growers hit it.

What that looks like in South San Francisco square footage

A 10 by 10 foot room with two vertical shelving units holds 60 to 80 active trays. That is enough to produce $3,000 to $5,000 per month in South San Francisco at standard wholesale prices. A two-car garage doubles it. A basement triples it.

What does your year look like when the East Grand lunch corridor and the Grand Avenue dinners are on standing delivery, and the question each Monday is which one new cafe to add?

Three things every working microgreen farm in South San Francisco runs on

  1. A seed density and watering plan you trust. The number one cause of failed trays for new growers is over- or under-seeding. The cheat sheet inside Grown Like A Pro gives you grams per 10x20, soak hours, blackout days, harvest day, and watering for sixty-one varieties.
  2. A rotation tracker. Once you are running thirty-plus trays per week, you cannot remember what is in blackout, what is in light growth, what harvests Tuesday. A spreadsheet works for the first month. After that you need a system that pings you the day before each harvest and reorders seed before you run out.
  3. A customer + invoice layer. Restaurants in South San Francisco want predictable weekly invoices and net-15 terms. Farmers market customers want clamshell tracking. Both want consistency. The app handles both.

The IKEA test

If you can follow an IKEA instruction sheet without screaming at the family, you can grow microgreens at a commercial level in South San Francisco. The steps are about that difficulty: open the box, lay out the parts, follow the picture, repeat. Trays are the bookcase. Seed is the dowels.

If you ever did struggle with the IKEA bookshelf, that is exactly why Glappy lives inside the app. Glappy is the in-app coach that breaks every step down barney style, in your own language, from "how do I plant my first tray" to "why is this tray going leggy at day five and what do I do about it tonight." Type the question, get a step-by-step answer. There is no question too basic. The whole point is that a South San Francisco grower starting today is not on their own.

What you are not buying

You are not buying a course. You are not buying a hype product. You are not buying seed from us, and you are not buying trays from us. We do not sell either. Grown Like A Pro is the operating system you run your South San Francisco farm on. The growing happens in your basement.

Try Grown Like A Pro free for 30 days →

South San Francisco microgreen FAQ

How much can I make growing microgreens in South San Francisco?
A working microgreen farm in South San Francisco produces $3,000 to $8,000 per month within 90 days of starting. The math: 100 trays per week, $20 to $30 net revenue per tray, harvested in a basement, garage, or spare room. The ceiling is set by how many restaurants and farmers market customers you can serve, not by the growing setup.
Is it legal to sell microgreens in CA?
Yes. In most of California, microgreens fall under the state's cottage food law for direct-to-consumer retail at farmers markets and to private customers. Restaurant wholesale typically requires a basic food handler permit. Verify with the California Department of Agriculture before you sign a wholesale contract.
What microgreens sell best in South San Francisco?
Sunflower, pea shoots, and radish are the three highest-volume sellers in nearly every U.S. city, including South San Francisco. Broccoli is the highest-margin variety because of its sulforaphane reputation with health-focused buyers. Specialty varieties like amaranth and shiso command premium pricing from chef-driven restaurants.
How much space do I need to grow microgreens in South San Francisco?
A 10 by 10 foot room with two shelving units holds 60 to 80 active trays, which is enough to produce $3,000 to $5,000 per month. A basement, garage corner, spare bedroom, or sunroom all work in South San Francisco's climate. Vertical shelving is the fastest path to higher revenue per square foot.
What is the best app for tracking microgreen production in South San Francisco?
Grown Like A Pro is the operating system used by working microgreen farms in South San Francisco. It handles seed density math, watering schedules, harvest timing, inventory, customer orders, and the financial side. Free 30-day trial with no credit card.
How long does it take to learn to grow microgreens commercially?
Most growers in South San Francisco are selling their first trays within 30 days of starting. Commercial proficiency, meaning you can run 50-plus trays per week without losing crops to mold or under-seeding, takes 60 to 90 days. The seed density and watering math is the single biggest predictor of how fast you get there.
Do I need a license to sell microgreens in South San Francisco?
For farmers market and direct-to-consumer sales in South San Francisco, most growers operate under California's cottage food law with no special license. For wholesale to restaurants and grocery stores, you typically need a basic food handler permit, a sales tax permit, and depending on volume, an inspection from your county health department.
How do I price microgreens to restaurants in South San Francisco?
Restaurant wholesale in South San Francisco runs $1.50 to $2.50 per ounce for standard varieties, $3 to $5 per ounce for specialty varieties like shiso, micro basil, or amaranth. Sell by the pound for repeat accounts. Local fresh commands a premium over the shipped-in product that most South San Francisco restaurants currently buy.

Related guides

Once you have the South San Francisco math in your head, the next read is the density chart that drives every tray you plant.

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