Answer: There are a number of small shrubs or shrubs which you can prune to keep them small so they won't outgrow the space. What you plant will depend upon the exposure to sunshine. A shady site can be planted with hostas and ferns with a few colorful annuals (lobelia, impatiens, pansies, etc.) tucked in for a splash of color. A sunny spot can have lavender, heather, dwarf English boxwoods or rosemary, plus some well behaved trailing plants such as geranium, lantana or or wooly thyme. You might also consider some slow growing upright plants such as junipers or nandina (heavenly bamboo). Hope this information gives you some ideas. For even more inspiration, visit a local nursery and look for dwarf varieties of plants you especially like. Best wishes with your raised planter!
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