Specifically formulated to meet the exacting needs of most orchids. Entirely free from urea which has been shown to be toxic to certain orchids. Nitrogen supplied in 100% nitrate form for strong healthy growth over long periods. Also suitable for use on Bromeliads and indoor plants. Use Orchid Bloom when the plant is flowering. Switch to Orchid Grow when flowering has stopped. Change back to Orchid Bloom when new flower spike appears.