Urban gardens have experienced a boom in recent times and have become a preferred option for those who want to grow their own fresh, healthy, and organic food, even while living in the city. Whether on terraces, balconies, patios, rooftops, planters, or windowsills, any space can be transformed into a small green oasis. If you're ready to delve into the exciting world of urban agriculture and learn how to create urban gardens , this comprehensive and detailed guide will accompany you step by step, from the basics to advanced tips and professional recommendations to help you get the most out of your space and your crops.
What is an urban garden and why create one?
An urban garden is a growing space located in urban environments, where vegetables, fruits, herbs, and even edible flowers are planted in quantities tailored to the space and family needs. It can be located on rooftops, terraces, patios, community gardens, balconies, windows, or in reclaimed and adapted public spaces.
Their benefits are numerous: they promote healthy and sustainable eating, contribute to improving environmental quality, help reduce the carbon footprint, strengthen urban biodiversity, and improve physical and mental health.
- Ecological and nutritional education: They teach both children and adults about the life cycle of plants, the importance of soil, and sustainable agriculture.
- Health & Wellness: Urban gardens produce fresh produce, free of pesticides and chemicals, offering authentic aromas, textures, and flavors.
- Reducing waste and environmental footprint: By using green waste as compost and producing your own food, you reduce waste generation and food transportation.
- Community Building: Community gardens increase neighborhood collaboration and interpersonal relationships.
Types of urban gardens: choose the ideal one for your space
Before starting an urban garden, it's important to understand the available options and which one best suits your home, habits, and goals:
- Potted garden: Individual pots or planters are used, ideal for balconies and windows.
- Garden on cultivation tables: Elevated containers, highly ergonomic, allow you to work standing up. Perfect for terraces and patios.
- Vertical garden: Panels, shelves, or vertical structures for hanging pots, perfect for making the most of walls and small spaces.
- Garden in sacks or textiles: Raffia bags, geotextile, or flexible and lightweight pots.
- Urban and community gardens: Collective spaces on rooftops or rehabilitated urban land.
- Guerrilla garden: Improvised crops in unused public spaces, promoting urban agriculture and social and environmental revitalization.
How to make an urban garden step by step
The success of your urban garden depends on the proper planning and execution of each phase. Here we show you the key steps, integrating the most relevant advice from experts and the experiences of top-rated urban gardens:
1. Select the perfect location
Light is the most crucial factor. Most crops need between 6 and 10 hours of direct sunlight per day to thrive. Choose a location that receives as much sunlight as possible, ideally facing south or southeast. If sunlight is limited, adapt your crops to the conditions (for example, grow herbs, lettuce, spinach, onions, and radishes in areas with less sun).
- Avoid areas with strong drafts, as they can dry out the substrate and damage the plants.
- Access to water: Make watering easier by choosing an area with access to a nearby water source.
- Ask permission if the space is communal. If the garden will be on a shared rooftop or terrace, check with the community first.
2. Choose the type of container and growing structure
The choice of container depends on the space, budget, and crops you want to plant:
- Pots and planters: Made of plastic, ceramic, clay, geotextile, or treated wood. Always with drainage holes in the bottom. Clay pots retain moisture and temperature better.
- Growing tables: Elevated, made of wood or plastic, very comfortable to work with and available in different shapes and sizes.
- Raffia or textile bags: Very lightweight and adaptable. Ideal for terraces or areas that require mobility.
- Vertical containers: Perfect for walls or walls, they allow you to maximize space on small balconies.
Ensure all containers have efficient drainage to prevent waterlogging and root rot. The larger the volume of substrate, the easier root development will be and the less frequent watering will be needed.
3. Prepare the ideal substrate for your urban garden
The substrate is the foundation of plant health. It should be:
- Light and porous: To facilitate drainage and aeration of the roots.
- Rich in organic matter and essential nutrients: Nitrogen, phosphorus, potassium, magnesium and minerals.
- Able to retain moisture, but allowing drainage.
Recommended combinations:
- Quality universal substrate, mixed with homemade or purchased organic compost.
- Balanced mixes: 60% coconut fiber + 40% worm castings; or 40% coconut fiber + 20% universal substrate + 15% compost + 15% manure + 10% vermiculite.
Always stir and renew the substrate after each growing cycle. Specific substrates for urban gardens, rich in mulch, coconut fiber, and natural fertilizer, are ideal to start with. You can also make compost at home with organic waste and leaves to enrich the substrate without adding chemicals.
- Drainage layer: Add a layer of gravel, small stones, or pruning waste (fine branches) to the bottom of the containers to improve drainage before adding the substrate.
4. Plan your crops: species, calendar and rotation
Make a list of the species you want to plant, taking into account your experience, ease of cultivation, and the climate/location of your home. If you're a beginner, opt for short-cycle, easy-to-grow species. For more information on what to plant in an urban garden, visit Discover the best types of gardens to grow at home.
- Quick and easy cycle vegetables: Lettuce, spinach, radish, arugula, onion, garlic, beetroot, chard, a variety of aromatic herbs (basil, parsley, thyme, mint, oregano, rosemary).
- Fruits and vegetables: Cherry tomatoes, peppers, eggplant, strawberries, carrots, green beans, zucchini, cucumber.
Planting and crop rotation calendar: For a proper plan, consult the annual crop calendar and organize your plantings according to each species and season.
- Consult a to know when to sow, transplant and harvest each species according to the season and climate zone.
- La crop rotation It is essential to prevent soil depletion and the appearance of pests. Alternate botanical families: Solanaceae (tomatoes, eggplants, peppers), Liliaceae (garlic, onions, leeks), Umbelliferae (carrots, celery), Compositae (lettuces), Legumes (beans, peas), Cruciferae (radishes, cabbages), and Cucurbitaceae (zucchini, cucumbers).
5. Sowing and transplanting: step by step
There are two main options:
- Direct sowing in the container: Scatter the seeds in the final containers and cover them with a light layer of soil. Water gently with a spray bottle. Plant small seeds (lettuce, carrot, radish) on the surface; plant larger seeds (beans, squash) deeper (three times their size).
- Sowing in seedbed or nursery: To better control germination, transplant only the most vigorous plants. Seedlings are transplanted when they reach the appropriate size (2-4 true leaves). Take special care not to damage the roots.
- When transplanting, make large holes with a shovel, position the plant, and gently press it into the potting medium. Water after transplanting.
Tips: Some plants (carrot, radish, beetroot) are best sown directly rather than transplanted, as they do not tolerate change well.
6. Useful tools for urban gardening
- Spear mattock: To clean plant debris and remove substrate.
- Forked hoe or hoe: For digging, removing weeds and aerating the soil.
- Manual cultivator: To aerate and loosen the surface.
- Trowel or transplanter: For making planting and transplanting holes.
- Small rake: To level the substrate and clean up debris.
- Carrycot and gloves: To transfer substrate and protect hands.
- Watering can, sprayer or hose with diffuser: For gentle manual watering.
You don't need complex tools; a basic kit can handle all the tasks of a home urban garden.
Maintaining an urban garden: essential care
Organic fertilizer and fertilization
Proper nutrient supply is key to maintaining the vigor and productivity of your plants. Use organic fertilizers such as compost, worm castings, well-rotted manure, guano, or organic liquid fertilizers. The frequency may vary depending on the crop and the substrate, but generally, it is sufficient to fertilize at the beginning of each cycle and once or twice during the growing season. For more information, see our guide on how to fertilize soil for planting.
- Composted fertilizers: Mulch, compost, and worm castings are added to the surface and lightly mixed into the substrate.
- Granulated fertilizers: They are distributed around the plant and gradually dissolve with watering.
- Liquid fertilizers: They are diluted in irrigation water for faster absorption.
Avoid conventional chemical fertilizers in organic urban gardens , as they can damage the substrate's microfauna and generate unwanted waste.
Efficient and adaptable irrigation
- Watering is more frequent in pots and growing tables than in soil, since the substrate loses moisture quickly.
- Hand watering: Ideal for small gardens, with a watering can or sprayer. Water at dawn in summer and at midday in winter to prevent evaporation.
- Drip irrigation system: It is the most efficient option, as it delivers water directly to the roots, saves time, prevents waterlogging, and allows for the installation of controllers.
- Self-watering planters: They have a reservoir at the base that maintains constant humidity.
Avoid wetting the leaves and flowers to prevent disease. Check the moisture of the soil by inserting a finger: if it comes out dry, it's time to water; if it comes out damp, wait.
Pest and disease control in an ecological way
Regular monitoring of urban gardens is essential to detect problems early and address them without resorting to toxic chemicals.
- Common pests: Aphids, whiteflies, red spiders, caterpillars, powdery mildew or fungi.
- Preventive techniques: Crop rotation, interplanting with aromatic plants that repel insects (basil, mint, thyme), keeping the environment clean and the crop aerated.
- Ecological remedies: Potassium soap dissolved in water, garlic infusion, neem oil, chromatic traps or placing onion skin to repel red spiders.
- Beneficial associations: Plant marigolds, nasturtiums, or other flowers that attract pollinators and repel pests.
In case of serious infections, cut and remove the affected parts, and do not use fungicides or systemic pesticides not permitted in organic farming.
Pruning, harvesting and renewing the garden
- Remove old, withered or damaged leaves to improve ventilation and reduce disease.
- Harvest at the right moment of ripeness to enjoy the best flavor and prolong the life of the plant.
- After each cycle, remove debris and stir the substrate to prevent compaction and promote aeration.
How to properly prepare a raised or layered urban garden
An advanced and highly efficient alternative, especially for terraces and gardens with space, is the layered urban raised garden. This system utilizes organic materials and improves soil durability and fertility.
- First layer (background): Pruning branches and cuttings or wood straw (about 20-25 cm) to facilitate drainage and aeration from below.
- Second layer: Dry leaves, grass clippings or other compressed plant debris (about 20 cm).
- Third layer: Coarse organic fertilizer mixed with leaves.
- Fourth layer: Potting soil or special substrate for urban gardens on top.
This method recycles green waste, reduces the risk of soil pests, and keeps the substrate fertile for years. When the nutrients are depleted, it's time to replenish the layers.
What and how many plants to put depending on the size of the container?
- In a standard tray (60 x 40 cm), you can plant 4-6 lettuces, 4-6 tomatoes, or 6-8 herbs. For carrots and root vegetables, choose a deeper container.
- Large, developing plants (zucchini, squash, eggplant) require more space and depth, and are more demanding in terms of nutrients.
- Take advantage of the spaces between main crops with aromatic herbs or edible flowers to reduce gaps and repel pests.
Ideas and tricks to maximize space and performance
- Use vertical gardens or hanging structures if your space is limited.
- Intercrop crops with different light and moisture requirements.
- Recycle recycled containers such as bottles or cans for mini crops or sprouts.
- Create crop rotations and companion crops to improve the yield and health of your garden.
- Control the weight of containers on terraces, especially if you use large growing tables or bags with a lot of substrate.
The comprehensive benefits of urban gardens
- Healthy nutrition: You'll get fresh, toxin- and pesticide-free food with an authentic flavor and aroma.
- Emotional well-being: Gardening and growing as a stress-relieving, enjoyable, and relaxing activity.
- Sustainability and environmental education: You reduce waste, reclaim space, and learn about the natural cycle of plant life.
- Reducing shopping basket spending: Less dependence on supermarkets, greater food autonomy.
- Promoting urban biodiversity: You attract pollinators and friendly microfauna; you improve local air quality and temperature.
- Social and community relations: Especially in community or school gardens, strengthening collaboration and coexistence.
- Positive contribution to the city: You help create sustainable ecosystems and combat the effects of urban climate change.
Frequently Asked Questions and Advanced Tips on Urban Gardens
- How long does it take for crops to grow in an urban garden? It depends on the cycle of each plant: radishes are ready in 3-4 weeks, lettuce in 6-8, tomatoes in 2-3 months.
- Do I need a lot of money to get started? No. You can reuse containers, make your own compost, and start with inexpensive seeds or cuttings.
- Is it difficult to maintain an urban garden? It's easy with a little dedication and a care schedule; check watering, lighting, and any pests daily.
- Can I have a garden anywhere? Yes, as long as you get enough direct light and adapt your crops to the space and climate limitations.
- Is it better to plant with seeds or seedlings? Beginners often start with seedlings purchased from nurseries, but with experience you can germinate your own seeds, even organic ones.
Transforming your home into a small, self-sufficient oasis has never been so accessible or so beneficial. Thanks to an urban garden, you can reconnect with nature, enjoy the process of growing your own food, and actively contribute to a greener and more sustainable environment. With patience and dedication, anyone, whether experienced or not, can enjoy the benefits of urban gardening and discover the pleasure of harvesting vibrant vegetables, herbs, and herbs right at home.
