Not all fertilizers contain enough calcium or sulfur for your plants. If you are growing vegetables, additional calcium will prevent blossom end rot. Are you tired of picking deadheads off your petunias? The addition of EVOLVE Organic Calcium Essentials will extend the life of your petals and you'll spend more time enjoying them versus picking them. Sprinkle it on top of your potting soil every 2 months! For even better results, use EVOLVE Organic Calcium Essentials with any other EVOLVE Organic Fertilizer.