Build a vertical garden on your city balcony: herbs, lettuce and vegetables

TL;DR

A vertical garden on your city balcony takes up almost no ground space, yields abundant herbs and lettuce, and turns your balcony into a green oasis. Use bamboo trellises, hanging planters, and vertical shelves - you need no more than 1 square metre. Start small with basil, parsley and rocket, later add cherry tomatoes. You harvest your first herbs after 6 weeks. It takes minimal upkeep and grows much faster than you expect.

💡 Your balcony full of green herbs and harvest by June - upload your balcony photo to [gardenworld.app](https://gardenworld.app) and see within 1 minute how a vertical garden looks in your space. Free first design, no credit card needed.

Why a vertical garden on your balcony?

In cities we have little ground but plenty of air. A vertical garden uses that vertical space smartly. You build your garden upward instead of outward. This has advantages:

• Your balcony looks greener without much floor space
• You harvest more vegetables per square centimetre than with ground planters
• It looks modern and tidy - not messy
• Herbs grow fastest in full sun and ventilation - which your balcony provides

You do not need potting soil in ground-level planters. Everything grows vertically upward. This is also ideal if your balcony gets strong wind (more on wind later).

What do you plant in a vertical garden?

Best choices for city balconies are plants that stay small, grow fast, and yield abundantly. These are:

Herbs (harvest after 6-8 weeks):

• Ocimum basilicum (Italian basil) - warm, full sun, harvest leaf continuously
• Petroselinum crispum (garden parsley) - half shade okay, harvest after 8 weeks
• Anethum graveolens (dill) - full sun, slender plant, easy vertical
• Origanum vulgare (oregano) - hardy, drought tolerant, regrows after harvest

Lettuce and vegetables (fast growing):

• Lactuca sativa var. crispa (crisp lettuce) - harvest leaf as needed, 6 weeks to full
• Eruca sativa (rocket) - peppery taste, 5 weeks to full, regrows well
• Spinacia oleracea (spinach) - compact, nutritious, harvest after 7 weeks
• Solanum lycopersicum 'Tiny Tim' (cherry tomato) - compact variety, full sun, hangs vertically easily

How do you build your vertical garden?

There are three styles: bamboo trellises with hanging planters, vertical plant walls, and stacked wooden boxes.

Style 1: Bamboo trellises + hanging planters

This is easiest. You lean two bamboo trellises (120-150 cm tall) against your balcony railing. Then you hang small planters (20-30 cm wide) in rows on them. You build four to six rows this way. Each planter gets two or three plants. Total roughly 12-18 plants on 1 square metre of balcony.

Advantage: cheap, easy to move, simple to water. Disadvantage: planters can swing in wind, must be secured well.

Style 2: Vertical plant wall (freestanding)

These are plastic panels with holes where you insert small plants. They stand on legs on your balcony. You can place them against your interior wall or freestanding.

Advantage: looks modern, many plants on small footprint (30-40 plants per m²). Disadvantage: pricier (100-300 euros), watering must be precise (water flows down), needs sheltered spot.

Style 3: Stacked wooden boxes

You make three to four wooden boxes (30 x 20 x 15 cm each) and stack them like stairs. Each box gets potting soil and three to four plants. Simple to build yourself, rustic look.

Advantage: robust, beautiful rustic appearance, simple to water. Disadvantage: takes more floor space than trellises, wood rots over time.

We recommend: start with bamboo trellises and hanging planters. Cheap, simple, and you learn how vertical gardens work first.

Potting soil and watering

For vertical planters use light, nutrient-rich potting soil. Normal garden soil is too heavy and waterlogged.

Choose:

• Vegetable/herb potting mix - bought from garden centre, premixed
• Or mix yourself: 60% coconut fibre, 30% garden compost, 10% perlite (for drainage)

Watering vertical gardens differs from normal planters. Water flows downward. Top rows dry quickly, bottom rows are often wet. Water the top in early morning. Two to three times per week in summer, less in spring.

Drip systems are your friend: If your balcony gets lots of sun and you work much, install a simple drip system. These are thin hoses you attach to a tap. Water drips slowly downward. Costs 40-60 euros and saves much hassle.

Sunlight and wind on balcony

Vertical gardens need lots of sun. Herbs and lettuce want at least 6-8 hours of direct sunlight daily. Vegetables like cherry tomato ask 8+ hours.

Check your balcony:

• Full sun (south side): 8+ hours direct light. Perfect for everything. Watering matters (dries fast).
• Half sun (east/west): 4-6 hours. Fine for herbs, lettuce grows slowly. Vegetables less productive.
• Shade (north side): 2-4 hours or filtered. Only parsley and dill grow well here.

Wind is a risk on balconies. Many balcony plants fall over or dry out from wind. A vertical garden helps: plants in planters stacked above each other get more shelter from each other. But heavy planters full of water must secure well. Use:

• Stainless steel chains or nylon straps
• Planters not on edges where wind funnels
• Bottom row planters extra well secured

💡 A vertical garden starts small - upload your balcony photo to [gardenworld.app](https://gardenworld.app) and see how your balcony handles adjustments. Free design, no credit card needed.

Step-by-step

Step 1: Choose your system

Decide: bamboo trellises, vertical wall, or stacked boxes. For beginners we recommend bamboo trellises with hanging planters (20-25 cm). Budget: 50-80 euros total for trellises and planters.

Step 2: Place and mount

Set your bamboo trellises or wall on a stable spot on your balcony. Ensure it does not fall in wind. Use hooks or screws in the railing, do not just lean against the wall.

Step 3: Fill planters with potting soil

Put potting soil in your planters until 2-3 cm below the rim. Do not compress. Water must flow through soil easily.

Step 4: Plant your herbs and vegetables

Place young seedlings (from garden centre) or seeds. For beginners: buy seedlings. They grow faster and you have fewer failures. Space: one plant per 15-20 cm planter width for herbs, one tomato per small planter.

Step 5: Water and tend

Water two to three times weekly, depending on weather. Give feeding (liquid plant food) once per two weeks. Harvest leaf once plant is 15-20 cm tall (herbs) or 30 cm (lettuce). This stimulates more growth.

Frequently asked questions

How much harvest do you get from a vertical garden?

From 1 square metre of balcony with 12-18 plants you can expect:

• Basil: 200-300 grams leaf per 8 weeks (harvest continuously)
• Parsley: 150-250 grams per 8 weeks
• Rocket: 300-400 grams per 6 weeks (fast mature)
• Cherry tomato: 500-800 grams per plant per season

This is enough for daily cooking and salad meals. You harvest best in June-September (warm, lots of sun).

Can you overwinter a vertical garden?

Some herbs yes, some no. Basil dies at first frost. Oregano, dill and parsley survive light frosts. On northern balconies: move them indoors around October, place on a windowsill. They grow slowly but still yield. Cherry tomato dies at frost.

Simpler: rebuild your vertical garden each spring. You need fresh soil anyway.

What if your balcony gets very windy?

Heavy planters full of water sway in wind. Do not make planters larger than 25-30 cm. Do not fill them completely with potting soil (leave 3 cm air). Tie everything extra well with chains or rope. Choose wind-hardy plants: dill, oregano, parsley sway with wind. Basil and rocket sometimes break.

How long until your first harvest?

Herbs like basil and parsley: 6-8 weeks from seedling to first leaf. Lettuce (rocket, spinach): 5-6 weeks to eating-ripe. Cherry tomato: 8-10 weeks to first fruit.

Start in April, harvest in June. Start in July, harvest in September. These are your best windows.

How much money does a vertical garden cost?

For bamboo trellis system:

• Bamboo trellises (2 units, 150 cm): 30-40 euros
• Hanging planters (12-18 units, 20-25 cm): 20-40 euros
• Potting soil (5 bags at 5 litres each): 10-15 euros
• Seedlings (12-18 units): 15-25 euros
• Total: 75-120 euros

You earn this back quickly harvesting daily basil (you would otherwise buy 2-3 euros per week).

Plan your own vertical garden

At [gardenworld.app](https://gardenworld.app) you can upload your balcony and see how a vertical garden fits - how large, which style, and how it combines with other plants. A design also shows shadow falling at different hours. Free first design, no credit card needed.

You also get tips for wind, watering, and best herbs for your balcony. Plan now and harvest next month.