Set pepper plant seedlings out after the last spring frost. Plant them 18 to 24 inches apart in a sunny, well-drained spot. Mix compost or other organic matter into the soil when planting. Water immediately after planting, then regularly throughout the season. Click to see full answer. Just so, how far apart do peppers need to be planted? 18 to 24 inches Also, how deep do peppers need to be planted? You should plant peppers deep into the soil for the same reasons as the tomato plant. Peppers are set slightly higher than tomatoes, unless the seedling is leggy. Set pepper plants in a hole that is twice as wide as the seedling root ball and about 1 inch deeper so a portion of the stem is below soil level. Beside above, what kind of soil do peppers like? Provide a sandy loam soil that drains well and contains plenty of organic matter. Depending on the size of the pepper varieties planted, spacing should be 12-18 inches apart. Peppers can double as ornamentals, so tuck some into flowerbeds and borders.Can peppers and tomatoes be grown together?Tomatoes: Although it’s usually recommended to not plant tomatoes and peppers right after each other in the same bed every year, they can be grown together in the same garden bed (and then rotated to another bed next season).