How to Create an Urban Garden with Kids: A Step-by-Step Family Guide

Creating an urban garden with children is one of the most complete educational activities a family can do at home. At Granja Natura, a nature education centre in Navàs (Bages), one hour from Barcelona, we have spent years bringing families closer to nature and animals, and we have seen first-hand how a small garden transforms children’s relationship with food and the environment.

This guide walks you through the entire process step by step, from choosing the right spot to your first harvest. You do not need prior experience or a large garden: a sunny balcony is enough.

Step 1: Choose the Right Spot

The fundamental requirement is sunlight. Vegetables need between 4 and 6 hours of direct sun per day. Observe your balcony, terrace, or windowsill for 2-3 days and identify the area with the most hours of sun.

If you live in a flat, south and south-east facing orientations work best. A north-facing balcony can work for aromatic herbs and lettuce, but not for tomatoes or peppers.

Practical tip: Make the children your “sun detectives”. Give them a clock and ask them to note down the hours when sunlight hits the balcony. This gets them involved from the very start.

Step 2: Pick Your Containers

You do not need to buy expensive materials. These options work perfectly:

• Planters 40 cm deep: ideal for most vegetables
• Raised growing table (80-100 cm high): perfect so children can work standing up without straining their backs
• Recycled wooden crates: free and easy to find (ask at local greengrocers)
• Cut plastic bottles: for individual aromatic herbs

The most important thing is that containers have drainage holes in the base. Standing water kills roots within 48-72 hours.

Step 3: Prepare the Growing Medium

Use a mix of:

• 60% quality universal substrate
• 30% mature compost
• 10% perlite or vermiculite (improves drainage)

This combination provides nutrients for the first 4-6 weeks without the need for additional fertiliser. A 50-litre bag of substrate costs between 5 and 8 euros and is enough for 3-4 planters.

Activity with children: Let them touch and mix the substrate with their hands. Touching soil activates the sensory system, and studies from the University of Bristol have shown that the bacterium Mycobacterium vaccae, found in soil, stimulates serotonin production.

Step 4: Choose Plants by Age Group

Not all plants are equally suited for working with children. Here is a tested selection:

For children aged 2-4

• Radishes: germinate in 5 days, harvested in 25 days. Quick and highly visual results.
• Lettuce: grows fast and leaves can be picked without uprooting the plant.
• Sunflowers: spectacular for watching growth (up to 2 metres in 8 weeks).

For children aged 5-8

• Cherry tomatoes: need stakes and tying, perfect for learning responsibility.
• Strawberries: the sweet reward keeps interest alive for weeks.
• Runner beans: climb up canes and grow very quickly (germinate in 7 days).

For children aged 9-12

• Peppers: longer cycle (90 days), teaches patience.
• Courgettes: abundant production, ideal for cooking together as a family.
• Mixed aromatic herbs: basil, parsley, coriander, mint.

Step 5: Sowing and Planting

April in the Barcelona and Bages area is ideal for sowing most vegetables. Here is the recommended sowing calendar:

Plant	Sow	Harvest	Days to harvest
Radish	March-May	April-June	25-30
Lettuce	March-June	May-August	45-60
Cherry tomato	April-May	July-September	70-90
Strawberry	March-April	May-July	60-90
Basil	April-May	June-October	30-40

Sowing technique with children: Make a hole with your finger (2-3 times the size of the seed), place the seed, cover with soil, and water gently. Children aged 3 can do this perfectly with supervision.

Step 6: Establish a Care Routine

Consistency is the key to success. Create a simple routine:

• Every morning (5 minutes): water if the soil feels dry to the touch. Children can check by pushing a finger 2 cm into the soil.
• Every week (15 minutes): remove weeds, check for pests, measure growth.
• Every 2 weeks: feed with organic liquid fertiliser diluted in watering water.

The garden journal: Give children a notebook where they draw the plants each week and record the height with a ruler. This single activity combines science, maths, and art in one exercise.

Step 7: Harvest and Celebrate

The harvest is the reward for the entire process. Some ideas to make it special:

1. Cook together: prepare a salad with the lettuce and radishes from your garden
2. Share the surplus: if you have too much produce, give some to neighbours or family
3. Document the journey: create a photo album from sowing to harvest
4. Plan the next season: decide together what you want to plant next

Educational Benefits of Urban Gardening

Gardening with children goes far beyond producing food. According to the Royal Horticultural Society, children who take part in gardening projects show:

• Stronger interest and better results in natural sciences
• Greater concentration and patience
• Reduced stress and anxiety (contact with soil releases endorphins)
• A healthier relationship with food (children eat more vegetables when they have grown them)

Take the Experience Further

If you want your children to connect even more deeply with nature, at Granja Natura we offer a family guided visit on weekends and public holidays to discover over 30 animal species, plus the afternoon workshop, where families fly birds of prey and get up close to invertebrates. We are located in Navàs, just 1 hour from Barcelona.

Visit us and discover how nature transforms the way children learn. Explore the family guided visit and the afternoon workshop, and when you are ready, book your visit online.