Fertilising guide
How to fertilise Sempervivum 'Commander Hay' (Sempervivum 'Commander Hay')— schedule & NPK
Also called Commander Hay houseleek.
More about sempervivum 'commander hay'
About Sempervivum 'Commander Hay'
Sempervivum 'Commander Hay' · also called Commander Hay houseleek · houseplant
Sempervivum 'Commander Hay' is a large, classic hybrid houseleek with broad, flattened rosettes in rich red-bronze tones edged with green tips. One of the bigger Sempervivums, it makes a bold statement and offsets generously into wide colonies. Cold-hardy and drought-tolerant, it asks only for full sun, gritty soil, and restrained watering.
Growth habit: Evergreen, mat-forming succulent and one of the larger houseleeks. Big rosettes spread by stoloniferous offsets into wide colonies. Each rosette is monocarpic, flowering once on a tall stalk before dying and being replaced by its chicks.
Watch for — Colour fading to green: The red-bronze tone needs full sun and cool, lean conditions. In shade or with feeding the large rosettes green over; boost light and cut back fertiliser to restore the colouring.
What fertiliser sempervivum 'commander hay' actually wants — and why
Sempervivum 'Commander Hay' is a light-feeding succulent — a gentle, low-nitrogen feed a few times in growth keeps it plump without forcing the weak, stretched growth over-feeding causes.
A cactus and succulent formula or a diluted balanced feed with modest, even numbers. Avoid high-nitrogen plant foods — they make a succulent etiolate and grow soft, fracture-prone tissue.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for sempervivum 'commander hay': match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed sempervivum 'commander hay', and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For sempervivum 'commander hay':
Very little. A single dilute low-nitrogen succulent feed in late spring is ample. Over-feeding produces soft, oversized, rot-prone growth and washes out the red-bronze colour, so keep nutrients lean. Keep that to sparingly through the growing season between spring through early autumn (roughly March to September) and stop entirely once growth slows for winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when sempervivum 'commander hay' is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for sempervivum 'commander hay'
Quarter to half strength at most for sempervivum 'commander hay'. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
Feeding always goes onto already-damp soil, never dry roots — water sempervivum 'commander hay' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the sempervivum 'commander hay' watering schedule.
Signs you are over-feeding sempervivum 'commander hay'
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for sempervivum 'commander hay':
- Stretched, leggy, pale growth with widely spaced leaves.
- A white salt crust on the soil or around the pot rim.
- Brown, crisped leaf tips and edges.
- Soft, mushy tissue at the base — over-feeding plus damp soil rots it.
Signs you are under-feeding sempervivum 'commander hay'
- Uncommon — succulents tolerate lean conditions well.
- Very slow growth and dull, faded colour over a long period.
- Older leaves shed faster than new ones replace them in a tired old mix.
If the symptoms point at watering, light or roots rather than nutrition, the full sempervivum 'commander hay' care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of sempervivum 'commander hay' until it drains clear, and refresh the gritty mix every 2-3 years.
Organic vs synthetic feeds for sempervivum 'commander hay'
Organic options
A heavily diluted seaweed or worm-casting feed once or twice in summer. UK: a drop of Westland seaweed feed; US: quarter-strength Espoma Cactus! or Dr. Earth liquid. Fresh free-draining mix matters more than any feed.
Synthetic / liquid feeds
A dedicated cactus/succulent liquid at quarter to half strength — UK: Baby Bio Cacti & Succulent Drip Feeders or Westland; US: Miracle-Gro Succulent Plant Food or Schultz Cactus Plus.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising sempervivum 'commander hay' — frequently asked questions
What fertiliser does sempervivum 'commander hay' need?
A cactus and succulent formula or a diluted balanced feed with modest, even numbers. Avoid high-nitrogen plant foods — they make a succulent etiolate and grow soft, fracture-prone tissue. Sempervivum 'Commander Hay' is a light-feeding succulent — a gentle, low-nitrogen feed a few times in growth keeps it plump without forcing the weak, stretched growth over-feeding causes.
How often should I feed sempervivum 'commander hay'?
Very little. A single dilute low-nitrogen succulent feed in late spring is ample. Over-feeding produces soft, oversized, rot-prone growth and washes out the red-bronze colour, so keep nutrients lean. Very little. A single dilute low-nitrogen succulent feed in late spring is ample. Over-feeding produces soft, oversized, rot-prone growth and washes out the red-bronze colour, so keep nutrients lean. Keep that to sparingly through the growing season between spring through early autumn (roughly March to September) and stop entirely once growth slows for winter.
What strength of feed for sempervivum 'commander hay'?
Quarter to half strength at most for sempervivum 'commander hay'. Succulents take up very little, and a strong dose burns the fine roots before the plant can use it.
What does over-feeding sempervivum 'commander hay' look like?
Stretched, leggy, pale growth with widely spaced leaves. A white salt crust on the soil or around the pot rim. Brown, crisped leaf tips and edges. Soft, mushy tissue at the base — over-feeding plus damp soil rots it. Feeding sempervivum 'commander hay' like a leafy houseplant is the classic error — it produces a flush of pale, stretched, floppy growth that never firms up and is prone to rot at the base.
Should I flush the soil of sempervivum 'commander hay'?
Feed lightly enough and you rarely need to flush, but once a year run plain water through the pot of sempervivum 'commander hay' until it drains clear, and refresh the gritty mix every 2-3 years.
Keep reading
- Sempervivum 'Commander Hay' care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water sempervivum 'commander hay' — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise snake plant
- How to fertilise dracaena
- How to fertilise peperomia
- All 2464 fertilising guides in the Growli library