The most useful thing I ever grew was a single square metre planted like a bouquet recipe: something tall, something round, something airy, something that spills.
The four-part recipe
Tall was larkspur. Round was zinnias. Airy was ammi, which makes every arrangement look like it happened by accident. The spiller was nasturtium, rioting over the edge exactly as intended.
From that one bed I cut a jam-jar bouquet every week for five months. Arranging from a small patch teaches restraint better than any workshop: you use what’s open, and the garden decides the palette.