Garden Guide

Garden Guide for Frankfurt, Hesse & Rhine-Main Region

Frankfurt sits in the mild climate zone 8a, thanks to the Rhine-Main Rift Valley and the urban heat island effect. Winters here are usually moderate, and summers can get warm to hot. The soil is often fertile, ranging from loamy-sandy to loamy, which makes it a great base for growing a wide variety of plants.

In Frankfurt, which is in climate zone 8a, you can start sowing outdoors from early April, right after the last frost. Many crops like radishes (sow April-September) and garden lettuce (start indoors March-September) absolutely love it here. For frost-sensitive plants like tomatoes (start indoors April-May) and potatoes (start indoors April), it's best to plant them out after the 'Ice Saints' period, typically mid-May. You can usually expect the first frost risk from mid-November.

Zone 8a Last frost: Early April First frost: Mid November mild

Also applies to: Wiesbaden, Darmstadt, Mainz, Offenbach, Hanau, Bad Homburg

Plan your Frankfurt garden in the Fryd app

Planting Calendar

When to start indoors, sow outdoors, and harvest in Frankfurt.

Light Water Nutrients

Start indoors Sowing Harvest

Planting calendar for Frankfurt, Zone 8a
Crop	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Carrots ●●● ●●○ ●○○
Lettuce (Lettuce) ●●○ ●●○ ●●○
Cucumber / Gherkin ●●● ●●○ ●●●
Courgette / Zucchini ●●● ●●● ●●●
Pepper / Paprika ●●● ●●○ ●●●
Potato ●●● ●●○ ●●●
Radishes ●●● ●●○ ●○○
Tomato (Bush tomato) ●●● ●●○ ●●●
Onion ●●● ●●○ ●●○
Tomato (Cocktail bush tomato) ●●● ●●○ ●●●
Bean (Dwarf bean) ●●● ●●○ ●○○
Pea ●●● ●●○ ●○○
Basil ●●● ●●○ ●●●
Beetroot ●●● ●●○ ●●○
Strawberry ●●● ●●○ ●●●
Kohlrabi / German turnip / Turnip cabbage ●●● ●●○ ●●○
Garlic ●●● ●●○ ●○○
Pumpkin / Squash ●●● ●●● ●●●
Broccoli ●●● ●●● ●●●
Common marigold ●●● ●○○

Carrots ●●● ●●○ ●○○

Lettuce (Lettuce) ●●○ ●●○ ●●○

Cucumber / Gherkin ●●● ●●○ ●●●

Courgette / Zucchini ●●● ●●● ●●●

Pepper / Paprika ●●● ●●○ ●●●

Potato ●●● ●●○ ●●●

Radishes ●●● ●●○ ●○○

Tomato (Bush tomato) ●●● ●●○ ●●●

Onion ●●● ●●○ ●●○

Tomato (Cocktail bush tomato) ●●● ●●○ ●●●

Bean (Dwarf bean) ●●● ●●○ ●○○

Pea ●●● ●●○ ●○○

Basil ●●● ●●○ ●●●

Beetroot ●●● ●●○ ●●○

Strawberry ●●● ●●○ ●●●

Kohlrabi / German turnip / Turnip cabbage ●●● ●●○ ●●○

Garlic ●●● ●●○ ●○○

Pumpkin / Squash ●●● ●●● ●●●

Broccoli ●●● ●●● ●●●

Common marigold ●●● ●○○

Planting Calendar Frankfurt

Carrots: Sowing Apr - Jun, Harvest Aug - Oct (Light: high, Water: medium, Nutrients: low)
Lettuce (Lettuce): Start indoors Mar - Sep, Sowing Apr - Sep, Harvest May - Oct (Light: medium, Water: medium, Nutrients: medium)
Cucumber / Gherkin: Start indoors May - Jun, Sowing Jun - Jul, Harvest Jul - Sep (Light: high, Water: medium, Nutrients: high)
Courgette / Zucchini: Start indoors May - Jun, Sowing Jun - Jul, Harvest Aug - Oct (Light: high, Water: high, Nutrients: high)
Pepper / Paprika: Start indoors Mar, Sowing Jun - Jul, Harvest Aug - Oct (Light: high, Water: medium, Nutrients: high)
Potato: Start indoors Apr, Sowing May - Jun, Harvest Jul - Oct (Light: high, Water: medium, Nutrients: high)
Radishes: Sowing Apr - Sep, Harvest Jun - Oct (Light: high, Water: medium, Nutrients: low)
Tomato (Bush tomato): Start indoors Apr - May, Sowing Jun - Jul, Harvest Aug - Oct (Light: high, Water: medium, Nutrients: high)
Onion: Start indoors Feb - Mar, Sowing Apr - May, Harvest Aug - Sep (Light: high, Water: medium, Nutrients: medium)
Tomato (Cocktail bush tomato): Start indoors Apr - May, Sowing Jun - Jul, Harvest Aug - Oct (Light: high, Water: medium, Nutrients: high)
Bean (Dwarf bean): Start indoors May, Sowing Jun - Jul, Harvest Aug - Sep (Light: high, Water: medium, Nutrients: low)
Pea: Sowing Apr - Jul, Harvest Jun - Oct (Light: high, Water: medium, Nutrients: low)
Basil: Start indoors Apr - Jul, Sowing Jun - Aug, Harvest Jun - Oct (Light: high, Water: medium, Nutrients: high)
Beetroot: Start indoors Mar, Sowing May - Jun, Harvest Aug - Oct (Light: high, Water: medium, Nutrients: medium)
Strawberry: Start indoors Mar - May, Sowing Apr - Jun, Harvest Jun - Sep (Light: high, Water: medium, Nutrients: high)
Kohlrabi / German turnip / Turnip cabbage: Start indoors Apr - May, Sowing May - Jun, Harvest Jul - Oct (Light: high, Water: medium, Nutrients: medium)
Garlic: Sowing Oct - Nov, Harvest Jul - Aug (Light: high, Water: medium, Nutrients: low)
Pumpkin / Squash: Start indoors May - Jun, Sowing Jun - Jul, Harvest Sep - Oct (Light: high, Water: high, Nutrients: high)
Broccoli: Start indoors Mar - May, Sowing Jun - Jul, Harvest Aug - Oct (Light: high, Water: high, Nutrients: high)
Common marigold: Start indoors Apr, Sowing May - Aug, Harvest Jul - Oct (Light: high, Nutrients: low)

Based on Fryd planting data for Zone 8a, 2026.

Companion Planting for Frankfurt

Plants that thrive together in Hesse & Rhine-Main Region.

Lettuce (Lettuce) + Carrots

Radishes + Carrots

Lettuce (Lettuce) + Radishes

Onion + Cucumber / Gherkin

Garlic + Cucumber / Gherkin

Plan companions visually

Drag and drop crops in the Fryd bed planner to see companion matches.

Try Fryd →

Growing Tips for Frankfurt

Keep Things Consistently Moist

Crops like radishes, broccoli, and pumpkins need a steady supply of water to really thrive and prevent them from getting woody. Especially during dry spells, make sure to water regularly to keep that soil nice and moist.

Soak Up the Sun for a Bountiful Harvest

Most veggies, like onions, tomatoes, and peppers, absolutely adore a full-sun spot. Pick the brightest places in your garden for these plants to really boost their fruit production.

Protect Frost-Sensitive Plants

Plants like pumpkins, courgette, beans, and tomatoes can't handle frost at all, so don't plant them outdoors until after the very last frosts. Starting them indoors or in a greenhouse is often a smart move to get a head start and extend your growing season.

Common Pests & Diseases

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Dealing with Aphids

Aphids love to suck the sap from young shoots and leaves. You can blast them off with a strong spray of water or use a soapy solution (like insecticidal soap and water) as a spray. Beneficial insects, especially ladybird larvae, are also fantastic natural predators!

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Keep Snails in Check

Snails absolutely love damp conditions and tender young plants. You can hand-pick them regularly, set up slug traps, or use iron phosphate-based slug pellets, which are safe for pets and hedgehogs.

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Prevent Late Blight

This fungal disease often hits tomatoes and potatoes, especially in damp weather. Make sure your plants have enough space and good air circulation. Remove any affected leaves right away and, importantly, don't put them in your compost!

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Deter Cabbage Root Fly

Cabbage root fly larvae can really damage the roots of brassicas like kohlrabi and broccoli. Protect your plants by covering your beds with fine mesh crop protection nets right after planting. Companion planting with celery can also lend a hand!

Frequently Asked Questions

When should I plant tomatoes in Frankfurt?

Tomatoes are super sensitive to frost. In Frankfurt, you should only plant them outdoors after the very last frosts, typically from June onwards. You can start them indoors from April to May, and then you'll be harvesting from August to October.

What climate zone is Frankfurt in and what does that mean for my garden?

Frankfurt is in climate zone 8a. This means you'll enjoy relatively mild winters and can grow a fantastic variety of plants that might struggle in colder zones. Plus, your growing season here will be longer!

Which vegetables grow particularly well in Frankfurt?

Thanks to the mild climate, lots of veggies absolutely flourish here! Radishes, garden lettuce, carrots, onions, potatoes, and various brassicas like kohlrabi and broccoli do especially well. Even heat-loving plants like tomatoes and courgette are super successful.

When is the last frost expected in Frankfurt?

You can typically expect the last frost in Frankfurt around early April. It's a good idea to wait until after this date to plant out any frost-sensitive plants, just to be safe and avoid any damage.