Miracle-Gro Bloom Booster plant food comes in water-soluble and granular mixtures for easy or long-term applications. Add water-soluble formulas to standard waterings at manufacturer-recommended rates. Add granular Shake N Feed Bloom Booster in the spring at planting --- and every three months thereafter --- for slow-release nutrition.
The University of Illinois Extension notes that fertilizers with a 5-10-5 analysis work well for vegetable gardens. Miracle-Gro Bloom Booster, or 15-30-15 plant food, fits into this category and promotes vegetative growth, root development and fruit set. Use this food safely through the growing season in either water-soluble or granular forms.
Fertilizer is only one step in growing garden vegetables. Plant them in sunny spots, and turn 4 inches of organic compost into the top 10 inches of soil at planting to give the vegetables rich, loose soil. This moisture-retaining mixture also gives plant roots the long-term water support they require.
Give vegetable plants additional maintenance with mulch, supplemental fertilizers and water. If you use water-soluble Bloom Booster, add it to the garden's regular watering schedule every seven to 14 days. If you use granular fertilizer, water the plants immediately after, and maintain a schedule of 2 inches of water a week. Lay 2 inches of organic mulch over the soil to keep it warm and moist during the growing season. Supplement the Bloom Booster with plant-specific fertilizers at midseason; many vegetable plants produce a better fruit harvest with individualized fertilizer applications at this time.