Youll want to use a particular fertilizer composition for the different stages of your rhododendron growth. You should apply it at the time of planting but repeat the application 2 or 3 times per year to maintain the necessary soil pH. Thats where hydrangea fertilizer can help. Liquid fertilizer can be applied via the soil or foliage. Lime will increase the soil pH, whereas sulfur will reduce the pH. Watering: Water this plant when the top several inches of soil dry out. Chemical fertilizers are mostly formulated in laboratories to replicate certain growing conditions. For rhododendrons, azaleas, camellias and other spring flowering shrubs put food on in early spring (February-March). If the leaves of your Hydrangeas show signs of scorching, you might have applied too much fertilizer. You can choose between various types of fertilizer for your plants. You can also use it for container plants or garden beds. Best For Large Blooms: EZ-GRO Fertilizer. Like all plants, hydrangeas draw nutrients from water, sunlight, air, and soil, but not all soil contains the nutrients necessary for robust growth and flower development. It is essential to understand where the drip line is of the shrub to know where to place the fertilizer. Most growers start fertilizing Hydrangeas in March. "Take calcium, for instance, an essential plant nutrient. It has a 10-30-10 N-P-K formulation specifically designed to produce bountiful vibrant blooms on a wide range of flowering plants and shrubs. All rights reserved. Feeding Rhododendrons: When And How To Fertilize Rhododendrons, Growing Rhododendron: Caring For Rhododendrons In The Garden, Azalea Fertilizer Tips Whats The Best Fertilizer For Azaleas, How To Create A Secret Garden In Your Own Backyard, Reasons For No Brussels Sprouts On Plants, Dahlia Support: How To Keep Dahlias From Falling Over, Planting Between Pavers Using Ground Covers Around Pavers, Pruning Overgrown Loropetalums: When And How To Prune A Loropetalum, Orange Tree Pollination Tips For Hand Pollinating Oranges, Home & Garden Marketplace: Advertiser Info. For the best results, apply Espoma granules around the plants base in early spring before flowerhead buds develop and reapply every 60 days. USMASS Extension Growing Tips : HYDRANGEAS Color + Fertilizing (PDF), https://ag.umass.edu/sites/ag.umass.edu/files/pdf-doc-ppt/fs5_hydrangeacolorfert14.pdf, University of Tennessee Institute of Agriculture: Hydrangea Production (PDF) https://plantsciences.tennessee.edu/wp-content/uploads/sites/25/2021/11/Hydrangea-Production_Species-Specific-Production-Guide-PB1840-B.pdf, Privacy Policy This affordable option features a 15-30-15 N-P-K formulation that promotes more blooms per shrub, along with vibrant flower heads. . They also have large blooms. Its easy to use; you have to simply spread it around the base of the plant. Apply only what you need and no more, since excess fertilizer burns a plants roots. But I would highly recommend testing the soil pH before application. In autumn, applying organic compost or manure is sufficient. The classic green-leaf fertilizer is the only one you need. As the name suggests, these are granular fertilizers. Get the J R Peters fertilizer on Amazon and at Walmart. The result can be poisoned blossoms or fruit that are hard to harvest. For more information and to buy this product, click here. Feed again in early or midsummer. This fertilizer is made to dissolve in water, and the solution is then poured around the base of the plant where it is quickly absorbed by the roots. The best fertilizer for hydrangeas should contain a blend of nutrients to encourage healthy root and branch development while boosting the color, size, and quantity of flower heads. Long lasting, slow-release feeding with our exclusive Bio-tone Microbes. Discontinue it in winter. It is made with ingredients that are very low in acidity, and it can be used in both indoor and outdoor gardens. Spikes are similar to granular fertilizers in that they dissolve slower and provide nutrients to plants over a longer period of time. It provides quick results because it feeds the plant roots. To qualify as a top pick, a fertilizer should provide the nutrients hydrangeas need for developing strong branches, healthy foliage, and beautiful blooms. Improperly fertilizing hydrangeas can affect the health of the bloom and the number of blooms that cover the plant. 9 Best Fertilizers for Garden A Buyers Guide. Bigleaf Hydrangeas: They need multiple applications in March, May, and June. This hand-crafted fertilizer is highly recommended for organic gardening of Hydrangeas and other acid lovers. Miracle-Gro Water Soluble Bloom Booster Flower Food, JR Peters Jacks Classic Blossom Booster Fertilizer, Might need extra applications on alkaline soil, Promotes strong plants while fighting pests, Prevents powdery mildew, block spot, and more, Includes ingredients that could harm bees, Must be diluted properly and applied regularly, Includes trace minerals with fertilizer formula, Works for starts, transplants, and established plants, Effectiveness may depend on existing soil conditions, Continuously feeds acid-loving plants for months, Effective for transplanting or a mid-season boost, Strong smell could attract dogs or insects, Feeds acid plants but doesnt lower soil acidity. Take care not to apply too much fertilizer as it could burn the leaves. The best fertilizers for hydrangeas are all-purpose fertilizers with an NPK ratio of 8-8-8 or 10-10-10. The best fertilizer for any individual hydrangea plant will depend on the gardeners preferred method of delivering the fertilizer to the soil, and the condition of the existing soil. Because you can accurately determine what all nutrients are present or lacking from the soil. For a 100 square foot garden bed, use 10 pounds of fertilizer. If your shrubs require feeding, you not only need to know when and how to fertilize rhododendron bushes, but youll want to use the best fertilizer for rhododendrons. The #1 choice for feeding hollies, azaleas, camellias, evergreens, dogwoods, rhododendrons & more! The pH scale ranges from 0 to 14, with 7 considered neutral. All three offer slightly different benefits. The Oakleaf variety blooms from early summer in southern regions and midsummer to early fall in the Midwest and northern states. I consider this the perfect slow-release fertilizer because it feeds not only the root zone but also everything above the soil surface. The 1.5 lbs package can feed 600 sq ft of the area, so its a long-lasting purchase. The three macronutrients are distributed in the ratio of 4-5-4. This slow-release plant food is formulated for flowering trees and shrubs that need continuous feeding in the blooming and growing season. Liquids can be diluted and poured around the plants base or sprinkled on the foliage, while granules are often worked into the top inch or so of the soil. Sprinkle it as evenly as possible where the plants are and water it in. Dig four small holes around the trunk of your shrub with a soil auger or bulb planter. Full blooming colorful hydrangeas are a sight to behold! The only precaution is it should be applied in mild weather in the late evening or early morning. Although youll find some products labeled as specific for rhododendrons and azaleas, these are not necessarily the best for your plants since they acidify the soil. Jobe's Fertilizer Spikes for Azaleas, Camellias & Rhododendrons are specially formulated to fertilize acid-loving plants. Usually a 10-10-10 is best for a first dose, and 10-30-20 for a second dose. Commercial fertilizers are labeled by the amounts of nitrogen (N), phosphorus (P), and potassium (K) they contain by weight, which appears on the package as the N-P-K ratio. This fertilizer is used by professionals for flowering plants like Azaleas and Rhododendrons. This ease of use is why Osmocote's customers rave about this product and call it the best fertilizer for Azaleas. If you are concerned about cost, granular fertilizer is the best fertilizer for rhododendrons since it is the cheapest. If leaves begin to yellow and appear unhealthy, add a light dose of liquid iron twice a year or another fast-acting fertilizer to remedy the issue. In less fertile soils, a complete fertilizer designed for acid-loving plants may be applied in late winter or early spring. Fertilizers will help you create the perfect environment for growing, Can be used for other acid-loving plants like Rhododendron, orchids, etc, Suitable for indoor and outdoor Hydrangeas, Customers have complained about the packaging, Can be used for several blue or pink Hydrangeas varieties, Proven to enhance and maintain the blue color of flowers, Comes with a measuring spoon and instruction pamphlet, Some customers have reported lavender flowers instead of blue, Enhances the vibrant blue color of flowers. Lower Soil pH It's always a good idea to add coffee grounds to compost , but mixing it directly into the soil can help balance alkaline soil or give a boost of acidity for plants that prefer a lower pH, like hydrangeas or rhododendrons. It will thrive if provided morning light and afternoon shade. It also lowers the soil pH to create a perfect soil for acid-loving plants. Look for an all-purpose, balanced fertilizer which would typically be labeled 10-10-10 for each of the ingredients by weight. You can use it at the time of planting or when the Hydrangeas shows sign of new growth. Adapted for a wide range of hardiness zones, rhododendrons are found in landscapes and gardens across a good portion of the United States. Amazon, Amazon Prime, the Amazon logo, and the Amazon Prime logo are trademarks of Amazon.com, Inc. or its affiliates. Acidic If the soil pH is close to 6, your Hydrangeas flowers will be in shades of dark pink, red or purple. Its the perfect plant food for outdoor flowering plants like Hydrangeas. It provides instant results but make sure you repeat the application every 7 or 14 days for the first month. Choose the best fertilizer for Hydrangeas from this guide, and soon you will be rewarded with glorious blooms and lush green foliage. Learn tips for creating your most beautiful home and garden ever. To change the color of these flowers, add small amounts of sulfur or lime to the fertilizer. Best Convenient:Southern Ag All Purpose Granular Fertilizer. As a bonus, we also included an all-in-one product that is an effective pesticide and fertilizer that also helps plants resist common diseases. Therefore, avoid using liquid fertilizer if rainfall is expected. But this beautiful plant needs fertile soil to produce vibrant blooms. You just sprinkle the amount specified on the label on the top of the soil around each plant and water it in. You can buy this fertilizer by clicking here. Fertilizers that need to be diluted before application require more time compared to granular varieties that should be spread directly onto the soil. Late evening or early morning plants are and water it in the drip is. This the perfect plant food is formulated for flowering plants like azaleas and rhododendrons of the bloom and the of. 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