7. Add Coffee Grounds and Eggshells for a DIY Calcium-and-Acid Kick
Used coffee grounds and crushed eggshells are excellent organic amendments for hydrangeas. Coffee grounds add acidity to the soil, which can help maintain the desired pH level for optimal growth, while eggshells provide calcium, an essential nutrient for cell wall development and overall plant health. Sprinkle coffee grounds around the base of the plant and lightly incorporate them into the soil. Similarly, crush eggshells into small pieces and scatter them around the drip line to slowly release calcium as they decompose.
8. Target Potassium and Phosphorus to Pump Up Flower Size, Not Leaves
While nitrogen is essential for vegetative growth, excessive amounts can lead to more leaves and fewer flowers. To focus on flower production, incorporate fertilizers that are rich in potassium and phosphorus. Potassium aids in the overall health and stress resistance of the plant, while phosphorus directly supports flower development. Consider using a bloom booster with a higher potassium and phosphorus content, such as a 5-10-10 formula, to encourage larger and more abundant blooms.
9. Water-Feed With a Weekly Liquid ‘Bloom Tea’ in Late April
Supplement your solid fertilizers with a weekly application of liquid ‘bloom tea’ starting in late April. This homemade or commercially available mix typically contains a blend of water-soluble nutrients that are quickly absorbed by plants. To make your own, steep a mixture of compost or aged manure in water for a few days, then strain and dilute the liquid before applying it directly to the soil around your hydrangeas. This nutrient-rich tea provides an immediate nutrient boost and promotes vigorous flowering
10. Lock In Nutrients With Mulch So Your July Blooms Explode
Mulching is a crucial step in maintaining moisture and temperature consistency in the soil, which is vital for nutrient uptake and overall plant health. After feeding and amending the soil, apply a 2-4 inch layer of organic mulch, such as shredded bark or pine straw, around your hydrangeas. This layer will help retain moisture, suppress weeds, and slowly break down to add organic matter and nutrients back into the soil. By locking in the nutrients provided during your April feeding, your hydrangeas will be primed for explosive blooms come July.
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