Fertilizer for Sempervivum: NPK Guide and Application Rates
Sempervivum (Hens and Chicks) are cold-hardy succulents that thrive in rocky, nutrient-poor soils. They need almost no fertilizer, and many growers never fertilize them at all. Over-fertilizing causes soft, oversized growth that is susceptible to rot and reduces the tight rosette form that makes these plants attractive.
Quick Reference
What NPK Ratio is Best for Sempervivum?
The recommended NPK ratio for sempervivum is 5-10-10. The phosphorus-heavy 5-10-10 ratio supports strong root systems and flower/fruit production in sempervivum.
Sempervivum NPK needs shift at each growth stage. Very dilute balanced feed for small offsets (chicks) during the Seedling phase, then mother rosette dies after flowering (monocarpic); feed chicks instead once flowering begins.
NPK by Growth Stage for Sempervivum
| Growth Stage | NPK Ratio | Notes |
|---|---|---|
| Seedling | 5N 5P 5K N 5% Nitrogen: leaf and stem growth P 5% Phosphorus: roots and flowers K 5% Potassium: health and disease resistance Learn more about NPK | Very dilute balanced feed for small offsets (chicks) |
| Vegetative | 5N 10P 10K N 5% Nitrogen: leaf and stem growth P 10% Phosphorus: roots and flowers K 10% Potassium: health and disease resistance Learn more about NPK | Low nitrogen keeps rosettes tight; P and K support root health |
| Flowering | 5N 10P 10K N 5% Nitrogen: leaf and stem growth P 10% Phosphorus: roots and flowers K 10% Potassium: health and disease resistance Learn more about NPK | Mother rosette dies after flowering (monocarpic); feed chicks instead |
| Fruiting | 5N 10P 10K N 5% Nitrogen: leaf and stem growth P 10% Phosphorus: roots and flowers K 10% Potassium: health and disease resistance Learn more about NPK | N/A for succulent care |
When Should You Fertilize Sempervivum?
In zone 3, start fertilizing sempervivum in undefined. In zone 9, begin as early as undefined. Apply every 12 weeks through the growing season.
Which Zones Can Grow Sempervivum?
Sempervivum grows in USDA zones 3 through 9, spanning a 7-zone range.
Fertilization Start by Zone
| Zone | Start Month |
|---|---|
| Zone indoor | March |
What Are the Best Fertilizer Products for Sempervivum?
Look for products with an NPK close to 5-10-10. Schultz Cactus Plus is the most popular choice among home gardeners for sempervivum.
- Schultz Cactus Plus
- Miracle-Gro Succulent Plant Food
- Espoma Organic Cactus Food
Prices vary by retailer and region. Check current pricing before purchasing.
Container and Raised Bed Adjustments for Sempervivum
Container sempervivum can be fed once or twice per year at quarter strength; outdoor rock garden plants rarely need any fertilizer
Common Fertilizing Mistakes with Sempervivum
- Fertilizing alpine plants that are adapted to nutrient-poor rocky soils
- Using rich potting soil that provides too much nutrition and retains too much moisture
- Trying to prevent flowering with fertilizer changes (it is genetically programmed)
- Over-feeding container plants that need even less nutrition than most succulents
- Using nitrogen-heavy fertilizer that produces soft, rot-prone growth
Tips for Fertilizing Sempervivum
- Sempervivum in the ground rarely need any fertilizer at all
- Container plants can receive a single light feeding in spring at quarter strength
- Lean, nutrient-poor soil actually produces the most attractive, colorful rosettes
- These are monocarpic: the mother rosette dies after flowering regardless of feeding
- Focus on excellent drainage rather than nutrition for healthy plants
Organic Fertilizer Alternatives for Sempervivum
Sources
Source:West Virginia University Extension - Succulents 101Last updated: