Where to buy Heirloom Pink Celery. Buy best farm raised Heirloom Pink Celery. Easy to plant fast to grow gardening delight. Excellent companion plant for Asparagus roots . The benefit to growing Pink Heirloom Celery are many. First it is an Heirloom with amazing flavor. Furthermore it is a gardening delight. Just plant in between your Asparagus and let her grow.. Buy many harvest plenty and freeze for when there is none.