Growing at home: Part 1 Methods & Environment

Dish is Square Mile Farms’ Head Farmer. He’s spent the last year experimenting with growing 40+ types of vegetables, herbs and microgreens at our Paddington rooftop farm and in our office farm installations. Using his knowledge of building and maintaining indoor hydroponic systems he is on a mission to help London workers reconnect with their food by helping them grow it themselves!

Over the coming weeks and months Dish is going to share his experiences of moving our urban farm to his home (check out our kale seedlings in the image above) and provide tips and guidance on how you can also grow at home to help you learn, clear your mind, and grow your own fresh produce.

In this article Dish will outline popular methods for growing at home and how you can optimise your growing environment.

If you’d like to grow at home, but you’re not sure where to start, we’re here to help! I'm going to explain traditional methods and modern systems for growing all sorts of greens (salad leaves, vegetables and herbs) at home. We’ll also look at how to create a suitable environment for our plants within our homes, from light levels to temperature and airflow. Surveying your environment before you start will give you a better understanding of what you will be able to grow.

How can we grow from our homes?

There are lots of methods for growing food from home, the right one for you depends on the space you have and how much time (probably quite a bit at the moment) and money you want to invest into the project.

Container Gardening

The simplest solution to home growing is using containers filled with compost, which can be placed indoors or outdoors. They can be anything from a plant pot to a wooden barrel or an up-cycled water bottle, you are limited only by your imagination. The main thing to remember is that the soil needs to drain well so the roots are not waterlogged, so first ensure there are drainage holes in the bottom of your container. And if your plant is indoors, position the pot in a tray, or something similar to avoid the water draining onto the floor!

You can also improve drainage by placing a layer of gravel at the bottom before adding soil, or mixing perlite (a porous volcanic rock) with the soil to ensure there is air pore space in the soil so it freely drains (experiment with using 10-50% perlite in the mix).

Raised Beds

If you have garden space available for growing, raised beds are one of the best ways to grow large amounts of produce. The higher soil temperature of raised beds increases the growing season by a couple of weeks! They also offer good drainage because soil compaction is not an issue. Depending on how high you build your raised bed, it can also require less bending over, making tasks such as weeding and tending to plants much easier.

Hydroponic Systems Although equipment for soil-based gardening is the easiest to find in shops, hydroponic systems are now widely available and all of them can be made from everyday items.

Wick Systems are the simplest of all hydroponic systems. They use cotton or nylon wicks to pull water into the growing medium by capillary action. This passive system requires no moving parts however is not recommended for thirsty plants. Plants that require less water such as rosemary are great for wick systems.

Deep Water Culture (DWC) systems are very simple to make and operate. The seedlings sit directly into a nutrient solution. Plant roots have a high demand for oxygen and since there is no circulating water, an airstone is used to aerate the nutrient solution (similar to a fish tank). This system is great for growing Lettuce, Kale, Chard and Basil.

Flood and Drain systems are those in which trays are periodically flooded with water and then drained back into the reservoir. These systems are extremely versatile, we use them to grow seedlings and microgreens at our farm. You can also use them to grow baby leaf plants.

Nutrient Film Technique (NFT) is a technique wherein a very shallow stream of nutrient solution is re-circulated past the bare roots of plants in a gully. NFT systems can grow most mature herbs and vegetables.

Vertical systems are a great option for saving space, they can be placed against or mounted directly onto walls. A lot of vertical systems are grown with the same principles as NFT but on the vertical plane. They are easy to harvest and clean since most plants are in your eye line.