Heirloom Roses Granular Rose Fertilizer 8 lb — 15-10-10 Slow-Release for Established Roses, Continuous Blooms

Heirloom Roses Boost & Bloom Granular Fertilizer is a balanced 15-10-10 formula designed to feed established in‑ground roses for stronger roots and more frequent blooms during their second season and beyond.

Bring lasting vigor to mature roses with a granular feed that emphasizes bloom production and root development without overwhelming established plants. This 8 lb bag supplies a slow-release, season-long approach you can apply as a top dressing—recommended for roses in their second year or older and intended for in‑ground use only. The formula was developed to keep flowering consistent and foliage healthy across the active growing months when roses need steady nutrition.

How will this fertilizer change my roses' flowering pattern?

Boost & Bloom focuses on higher phosphorus and balanced nitrogen to promote bud set and repeat blooms throughout the season. Rather than a single flush, the slow-release granules feed over weeks, helping roses produce more frequent, well-formed flowers without forcing excessive leafy growth.

• Balanced 15-10-10 encourages bud development and steady flowering.
• Granular slow-release feeding reduces the need for frequent applications.
• Regular monthly top dressings maintain bloom rhythm during the growing season.

What’s the correct way to apply Boost & Bloom to avoid root stress?

Apply this product as a light top dressing placed around the drip line of established, in‑ground roses, avoiding direct contact with stems. Start in early spring and reapply about 1/2 cup per plant every four weeks during active growth, following watering so nutrients reach the root zone slowly.

• Use only on established in‑ground roses (not first‑year or container plants).
• Apply 1/2 cup per plant every four weeks during the season.
• Water after application to move nutrients into the soil without burning roots.

Will this product help my rose bushes develop stronger roots and foliage?

Yes—the formula supplies essential macronutrients that support root vigor and resilient foliage, helping plants withstand pests and environmental stressors better than undernourished specimens. Regular, measured feeding encourages denser root systems and healthier leaves, which in turn support sustained blooming.

• Phosphorus supports root and bud development for long‑term plant strength.
• Nitrogen levels tuned to avoid excessive vegetative stretch while supporting foliage.
• Slow-release granules reduce nutrient spikes that can stress roots.

Can I use this fertilizer for potted roses or newly planted bushes?

This product is formulated specifically for established roses in the ground and is not recommended for first‑year transplants or container-grown roses. Young or potted plants are more sensitive to concentrated granules and can experience root stress or burn if treated the same way as mature in‑ground plants.

• Not for first-year roses—wait until plants are established in the garden.
• Avoid use on container roses to prevent root burn from concentrated feeding.
• For new plantings, choose milder starter fertilizers or soil amendments until established.

Who is this for: Heirloom Roses Boost & Bloom Granular Fertilizer is aimed at home gardeners and rose enthusiasts who care for mature, in‑ground roses and want a straightforward, effective seasonal feeding routine. If you grow roses in beds or borders and are looking for steady bloom performance and improved root resilience without complex application steps, this 8 lb, slow-release option provides a practical feeding schedule and measurable results when used as directed.