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Old Cobblers Farm™ Wicked Growth Roses Fertilizer
Rose fertilizer (10-20-15) for lush blooms, strong roots, and vibrant growth. Application rates for all rose types from Old Cobblers Farm.
Old Cobblers Farm™ Wicked Growth Roses Fertilizer
Old Cobblers Farm™ Rose Fertilizer is a crop-specific granular blend with a 10-20-15 NPK ratio tailored to the demanding nutritional needs of roses. The doubled phosphorus relative to nitrogen drives prolific bloom production and deep root development, while elevated potassium strengthens stems, improves disease resistance, and extends the life of individual blooms.
Roses are among the heaviest-feeding ornamentals in the garden, and general-purpose fertilizers often fall short of their specific needs. This formula closes that gap with targeted ratios and slow-release delivery.
NPK
10-20-15
Type
Non-Organic
Derived From
Urea, Monoammonium Phosphate (MAP), Muriate of Potash (MOP), Pelletized Lime
Best For
Hybrid Tea Roses|Floribundas|Climbing Roses|Shrub Roses|Grandifloras|Miniature Roses|Landscape & Groundcover Roses|English and Heirloom Varieties
Brand
Wicked Growth
NPK Breakdown
N
10
10% Nitrogen encourages steady green growth to support lush foliage
P
20
20% Phosphorus powers big, bold blooms and promotes deep root establishment
K
15
15% Potassium boosts petal strength, disease resistance, and flower longevity
What Is It ?
Old Cobblers Farm Rose Fertilizer (10-20-15 NPK) is a premium blend crafted to support the unique needs of roses throughout their growing cycle. With boosted phosphorus and potassium, this formula enhances flowering, strengthens stems, and fortifies root systems for fuller bushes and longer-lasting blossoms. Whether you're growing hybrid teas, climbing roses, floribundas, shrub roses, or heirloom varieties in garden beds, containers, or along trellises, this slow-release formula ensures consistent nutrition for lasting floral performance.
When To Apply ?
For new roses, mix ½ to 1 cup into planting hole soil before watering in. For established roses, apply ½ cup per plant for small/young bushes and 1-2 cups per plant for mature/large bushes. Apply around the drip line, away from the base, and work lightly into the soil. Water deeply after application. Reapply every 4-6 weeks during the growing season (spring to early fall). Stop feeding 6-8 weeks before first frost in colder climates.
How to Apply ?
1.
New Roses
For new roses, mix ½–1 cup into planting hole soil before watering in. Incorporate throughout the backfill.
2.
Small/Young Bushes
For established small or young bushes, apply ½ cup per plant around the base.
3.
Mature/Large Bushes
For mature or large bushes, apply 1–2 cups per plant depending on size and vigor.
4.
Drip Line Application
Apply around the drip line, away from the base where canes emerge. Feeder roots are at the canopy edge.
5.
Incorporate
Work lightly into the top 1–2 inches of soil with a hand cultivator.
6.
Water In
Water deeply after application to dissolve granules and carry nutrients to the root zone.
7
Mature/Large Bushes
For mature or large bushes, apply 1–2 cups per plant depending on size and vigor.
How To Store
Store in a cool, dry place in original packaging. Wear gloves when handling. Keep away from children, pets, and water sources.
FAQs
1.
What is the best fertilizer for roses?
The best rose fertilizer provides balanced nutrition with an emphasis on phosphorus for abundant blooms and potassium for disease resistance. A complete formula that includes both macronutrients and micronutrients supports every aspect of rose health — from root development and cane strength to flower size, color, and fragrance. Roses are heavy feeders that reward consistent, balanced nutrition with repeat blooming throughout the season. Old Cobblers Farm™ Wicked Growth Roses Fertilizer is specifically formulated for hybrid teas, floribundas, grandifloras, climbers, shrub roses, and all other rose types.
2.
When should I fertilize my roses?
Fertilize roses in early spring when new growth begins (usually when forsythia blooms), after the first flush of flowers, and in mid-summer to support continued blooming. Stop fertilizing 6–8 weeks before your first expected frost to allow canes to harden off for winter. In warm climates with longer growing seasons, you may add an additional feeding in late summer. For newly planted roses, wait until the first set of leaves has fully developed before fertilizing. Old Cobblers Farm™ Wicked Growth Roses Fertilizer delivers the seasonal nutrition roses need for continuous, abundant flowering.
3.
How often should I feed my roses?
Feed roses every 4–6 weeks during the active growing and blooming season, typically from early spring through late summer. Repeat-blooming varieties like hybrid teas and floribundas benefit from regular feeding to sustain continuous flower production. Once-blooming varieties like some old garden roses and species roses need fewer applications — typically spring and early summer only. Always water deeply before and after fertilizing to prevent root burn and activate nutrients. Old Cobblers Farm™ Wicked Growth Roses Fertilizer provides the consistent nutrition repeat-blooming roses demand for maximum flower production.
4.
How much fertilizer does a rose bush need?
For established rose bushes, apply ¼ to ½ cup of granular rose fertilizer per bush, distributing evenly around the base out to the drip line. For miniature roses, use 1–2 tablespoons. For climbing roses, use ½ to 1 cup depending on the size of the plant. Work the fertilizer lightly into the top inch of soil and water thoroughly. For container roses, use 1–2 tablespoons per gallon of soil volume. Old Cobblers Farm™ Wicked Growth Roses Fertilizer is easy to measure and apply for consistent, beautiful results across all rose types.
5.
What nutrients do roses need most?
Roses need balanced amounts of nitrogen, phosphorus, and potassium, plus key micronutrients. Nitrogen promotes healthy green foliage and strong canes. Phosphorus drives root development and flower bud formation — it is the nutrient most directly responsible for bloom production. Potassium improves disease resistance, flower color, and overall plant resilience. Roses also benefit from micronutrients like iron, magnesium, and manganese for deep green leaves and vibrant flower colors. Old Cobblers Farm™ Wicked Growth Roses Fertilizer delivers all of these nutrients in a balanced, rose-optimized formula.
6.
Can I use rose fertilizer on other flowering shrubs?
Yes, rose fertilizer works well on many other flowering shrubs that share similar nutritional needs, including hydrangeas, lilacs, butterfly bushes, hibiscus, gardenias, and camellias. The balanced NPK ratio and micronutrient content support healthy growth and prolific flowering across a range of woody flowering plants. However, acid-loving shrubs like azaleas and rhododendrons may need a specialized formula with soil acidifiers. Old Cobblers Farm™ Wicked Growth Roses Fertilizer is versatile enough for mixed flowering shrub borders while delivering the premium nutrition roses specifically demand.
7
Why are my roses not blooming?
Roses may fail to bloom for several reasons: insufficient sunlight (roses need 6+ hours of direct sun), over-pruning of bloom-producing canes, too much nitrogen causing leafy growth at the expense of flowers, nutrient deficiency (especially phosphorus), drought stress, or pest and disease pressure. The most common nutritional cause is lack of phosphorus, which directly drives flower bud formation. Ensuring consistent, balanced feeding with adequate phosphorus often restores blooming. Old Cobblers Farm™ Wicked Growth Roses Fertilizer provides the phosphorus and balanced nutrition roses need to produce abundant, beautiful blooms.