It’s a good idea to mix some granular fertilizer into the soil at planting time. To keep annuals blooming well, reapply granular fertilizer every 6 weeks through the growing season. Use one pound of 5-10-5 or 5-10-10 or similar analysis for 100 square feet of bed area.Click to see full answer. Similarly, it is asked, what is the best fertilizer for flowers? The 10 Best Fertilizers for Flowers Flower Fertilizers Fertilizer Analysis Miracle-Gro Water Soluble All Purpose Plant Food 24-8-16 Bayer Advanced 701110A All in One Rose and Flower Care 6-9-6 Jobe’s Organics 09627 Organic Fertilizer 3-5-4 Fox Farm FX14049 Liquid Nutrient Trio Soil Formula 2-8-4, 6-4-4, 0.01-0.3-0.7 Beside above, when should I feed my flowering plants? When to feed plants Feeding is usually done in spring or summer, during the growing season. Few plants need fertiliser in the winter months, even if they are winter-flowering. Also, how often should you fertilize? For most lawns, applying fertilizer once or twice a year is enough to keep your grass green and healthy. Precisely when you apply fertilizer depends partly on your climate, but mostly on the type of grass you have. The key is to fertilize during the season when your grass is doing the most growing.Can you put fertilizer on flowers?Fertilizing your flowers can give them a nutrients boost and help them grow faster and healthier. Choose a natural or synthetic 10-20-10 fertilizer that contains nitrogen, phosphorous, and potassium. Alternatively, use a water-soluble fertilizer, which you can dissolve into water and spray directly onto your soil.