Fertilizing Your Summer Flower Garden for Brighter Blooms

Summer is the showtime for your flower garden—and your plants need the right nutrients to keep blooming strong through heat, humidity, and long sunny days. Whether you’re growing petunias, zinnias, roses, or tropical ornamentals, your flowers need more than water and sunlight to thrive.

In this blog, we’ll explore how to feed your flower beds during the hottest months using premium fertilizer blends from Supply Solutions LLC, including 10-10-10 with micronutrients, 12-6-6 ornamental blend, and supporting nutrients like calcium nitrate and ammonium sulfate.

What Flowers Need During Summer

Flowering plants are high-energy performers. In summer, they rely on: ✔ Nitrogen – for lush green leaves to support blooms
✔ Phosphorus – for strong root systems and bloom formation
✔ Potassium – for drought resistance and longer flower life
✔ Micronutrients – for color vibrance, foliage health, and disease resistance

Hot weather and frequent watering can quickly deplete these nutrients, making regular feeding a must.

Best Fertilizers for Summer Blooms

• 12-6-6 Ornamental Blend – Ideal for flowering plants in beds or pots
• 10-10-10 Liquid Fish Fertilizer with Micronutrients – Balanced, gentle feeding with soil microbe benefits
• Calcium Nitrate (15.5-0-0) – Strengthens stems and supports bloom production
• Ammonium Sulfate (21-0-0-24S) – Boosts nitrogen and corrects alkaline soil pH

Feeding Frequency and Timing

Application Frequency	Best Time to Apply
Every 7–10 days	Early morning or late evening
After deadheading	To support next bloom cycle
After heavy rain	To replace leached nutrients

Use diluted liquids to avoid burning sensitive roots and flowers.

Common Flowering Plants and Fertilizer Tips

Plant Type	Recommended Fertilizer
Petunias, Marigolds, Zinnias	12-6-6 every 10 days
Roses & Hibiscus	10-10-10 + calcium nitrate rotation
Hanging Baskets	12-6-6 at half strength weekly
Tropical Ornamentals	10-10-10 + ammonium sulfate every 2 weeks

Tips for Better Summer Flowering

• Water consistently—dry roots = stressed blooms
• Deadhead regularly to redirect energy to new flowers
• Mulch flower beds to retain moisture and buffer heat
• Use foliar feeding for immediate nutrient absorption, especially in stressed plants

Real Results

One gardener applied 10-10-10 fish fertilizer every 10 days on a mixed bed of annuals. By mid-July, flowers were still blooming strong despite 90+°F heat. The addition of calcium nitrate boosted bloom quality and helped stems stay upright even in heavy rain.

Avoid These Common Mistakes

• Over-fertilizing: Leads to leafy growth and fewer blooms
• Feeding dry plants: Always water before applying
• Ignoring pH: High pH soils block phosphorus and micronutrient uptake—use ammonium sulfate to lower it

Make Summer Bloom Brighter

Feeding your flower garden in summer isn’t just about keeping it alive—it’s about helping it flourish. With the right products and timing, you’ll get:

• More blooms
• Richer colors
• Longer-lasting displays

Let Supply Solutions LLC help you find the perfect summer feeding solution for your flower beds.

Reach out today for personalized support or product recommendations:

• Phone: 503-451-1622
• Email: sales@mysolutionssupply.com
• Contact Form
• Facebook Page

Your flowers deserve to be the brightest part of your summer. Start with the right fertilizer.