A plant's size is key factor to take in consideration when planning your outdoor space, it influences the number of plants necessary to achieve the result you have in mind and how the garden will look like for the first years of life.
Plant nurseries usually offer a great range of plants, native or adapted to the local climate. When planning your outdoor space, the best first move is to visit a local garden centre and look at the plants they have in stock, get inspiration by what you see there, check the availability of plants in different pot sizes, try a few plants combinations just placing plants close to one another.
“Gardening is learning, learning, learning. That’s the fun of them. You’re always learning. Helen Mirren”
It is of great importance to keep in mind that what you get locally available is what you need to work with and therefore start planning on paper with that.
Plan your outdoors watching the the plants sizes
When you're still planning your balcony, terrace or garden on paper it is important to work in scale -approximately - and it is appropriate to note down the mature size of each plant.
However, very often the local garden centre won't be able to supply you with mature size plants meaning that the reality will differ from the drawings and from the idea we have in mind.
We may be forced to start our garden with small plants and we should then wait a few months/ years to see it grown up to the size we first imagined.
Alternatively, to immediately obtain the result we want, it may be required to be generous with the initial planting numbers in particular if the plants provided by the nursery come in very small pot sizes.
In the following years then, the garden may grow so much that plants begin to suffer and in that case we will need to divide the plants that can be divided, for example most of the perennials.
Don't be intimated, this will be a fantastic opportunity to gift a plant to a friend or to expand your garden further!