Depending on what variety you have I would plant them at least 10-12" apart
Cauliflower plants should be planted about 18-24 inches apart and 1/2 to 1 inch deep in well-draining soil. The soil should also be rich in organic matter and the plants should receive full sun for optimal growth.
Ligustrum plants should be planted about 3 to 5 feet apart to allow them enough room to grow and develop a full canopy. This spacing will also ensure adequate air circulation, sunlight exposure, and prevent overcrowding as the plants mature.
Blue spruce trees should be planted about 10-15 feet apart to allow enough space for each tree to grow to its full size without competing for resources. This spacing will also ensure proper air circulation and sunlight exposure for optimal growth.
Winter gem boxwoods should be planted approximately 2-3 feet apart to allow them room to reach their mature size without overcrowding.
Corn should be planted at least 8-12 inches apart in rows that are 30-36 inches apart. This spacing allows each plant to have enough room to grow without competing for nutrients, sunlight, and moisture with neighboring plants. However, the exact spacing may vary depending on the variety of corn being grown.
Basil plants should be planted about 12 to 18 inches apart to ensure optimal growth and development.
Bougainvillea plants should be planted about 3 to 5 feet apart from each other to allow for proper growth and spacing.
Elderberry plants should be planted about 6-10 feet apart to ensure optimal growth and yield.
Mint plants should be planted about 12 to 18 inches apart to ensure optimal growth and health.
Squash plants should be planted about 2 to 3 feet apart in a raised bed to allow enough space for them to grow and spread out.
Some plants can be planted close together and others must be farther apart. When you plant seeds, the package will tell you how far apart the plants should be. When you plant live plants, there should be a tag that tells you how far apart the plants should be.
English laurel plants should be planted about 3 to 5 feet apart from each other to allow for proper growth and spacing.
Cherry laurel plants should be planted about 4 to 6 feet apart to ensure proper growth and spacing.
Basil plants should be planted about 12 to 18 inches apart from each other to allow enough space for growth and proper air circulation.
Blueberry and raspberry plants should be planted at least 4-6 feet apart from each other to allow for proper growth and spacing.
Tomato plants should be planted 36-60" apart from each other. If you plant them closer it increases the risk of disease.
Arborvitae plants should be planted about 3 to 5 feet apart for optimal growth and privacy screening.