Plant them close together
I’ll be the first to admit that I am an impatient gardener. When I plant my summer containers, for example, I space the plants close together to give me instant impact. Planting beds in a kitchen garden are like large containers, so don’t be afraid to plant closer than the seed packets recommend to minimize gaps. I space plants so that the tips of the leaves will almost touch those of the next plant at maturity. This approach employs the plants themselves as a living mulch to choke out weeds. It makes the garden look more lush and beautiful because you see more color and less bare soil.
In addition to planting tightly, consider adjusting your planting pattern. Instead of lining up crops in perfect rows, stagger the seedlings in a triangular pattern so that the bed fills in with a mass of color. Carrots, beets, lettuces, leeks, onions, and garlic can all be planted close together. As plants mature, I thin out every other one to eat at the baby stage and leave the rest to grow to full size. Inevitably, you will want to eat the edibles in your garden, which will leave unsightly holes. To fill the gaps, sow seed for fast-growing crops, like radishes, lettuces, and basils. The garden will be full and lush again in no time