Field Notes: The Coastal Fog Garden

Growing vegetables where the sun is a rumor

Why garden in fog?

Coastal fog delivers steady moisture and blocks the harsh light that bolts lettuce and splits tomatoes. A fog garden trades sun-hungry crops for the leafy, the rooted, and the patient — and in exchange, it almost never needs watering in summer.

Diagram: fog rolls from the ocean over a bluff onto terraced garden beds; arrows show moisture condensing on tall plants and dripping to the soil
Fig. 1 — Fog condenses on tall plantings and drips to the beds below: free irrigation.

What actually grows

The fog garden's honor roll: kale, chard, fava beans, potatoes, leeks, and every lettuce known to science. The heartbreak list: tomatoes, peppers, melons — anything that needs heat to sweeten.

Bar chart: success rate in coastal fog — kale 95%, chard 90%, potatoes 85%, leeks 80%, tomatoes 15%
Fig. 2 — Success rates from three seasons of notes. Tomatoes: we tried.

Soil temperature converter

Seed packets speak Fahrenheit; soil thermometers often speak Celsius.

With JavaScript: the answer updates live as you type. Without it, the button above appears and a server-side program does the math — a round trip that works even with CSS stripped. Either way, you get your °F.

The one rule

Plant what the climate wants to grow, not what the catalog wants to sell. The fog is not an obstacle to the garden. The fog is the garden.