Fertilising guide

How to fertilise Kalanchoe 'Calandiva' (Kalanchoe blossfeldiana 'Calandiva')— schedule & NPK

Also called Calandiva, Double-flowered Kalanchoe.

More about kalanchoe 'calandiva'

About Kalanchoe 'Calandiva'

Kalanchoe blossfeldiana 'Calandiva' · also called Calandiva, Double-flowered Kalanchoe · flowering

Calandiva is a compact succulent grown for dense clusters of long-lasting, rose-like double flowers in red, pink, orange, white or yellow. A short-day bloomer, it flowers when nights lengthen, often timed for winter colour. Thick, scalloped leaves store water, so it tolerates dry spells. A bright windowsill houseplant.

Growth habit: Bushy, compact, upright succulent subshrub with branching stems and dense terminal flower clusters held above the foliage. Naturally mounding and self-supporting.

What fertiliser kalanchoe 'calandiva' actually wants — and why

Kalanchoe 'Calandiva' is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom.

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 kalanchoe 'calandiva': 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 kalanchoe 'calandiva', 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 kalanchoe 'calandiva':

The dormant-season rule matters more than the exact interval: skip feeding entirely when kalanchoe 'calandiva' 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 kalanchoe 'calandiva'

Follow the flowering-feed label rate for kalanchoe 'calandiva', or half strength if feeding very frequently. These plants genuinely use the nutrients — under-feeding shows up fast as a thin display.

Feeding always goes onto already-damp soil, never dry roots — water kalanchoe 'calandiva' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the kalanchoe 'calandiva' watering schedule.

Signs you are over-feeding kalanchoe 'calandiva'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for kalanchoe 'calandiva':

Lots of lush leaves but few flowers (too much nitrogen).
Scorched leaf edges and salt crust from too-strong or too-frequent feeds.
Soft, sappy growth prone to aphids and mildew.

Signs you are under-feeding kalanchoe 'calandiva'

Sparse, small, short-lived flowers and pale foliage.
A tired plant that stops blooming early in the season.
Weak growth and poor repeat-flowering after the first flush.

If the symptoms point at watering, light or roots rather than nutrition, the full kalanchoe 'calandiva' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown kalanchoe 'calandiva' accumulates feed salts fast with frequent feeding — water until it drains each time and flush pots with plain water every few weeks to prevent scorch.

Organic vs synthetic feeds for kalanchoe 'calandiva'

Organic options

A liquid comfrey or seaweed feed (naturally potassium-rich) plus compost or well-rotted manure as a mulch. UK: comfrey feed, organic Tomorite, or rose feed; US: Espoma Rose-tone or Neptune's Harvest. Feeds and improves soil.

Synthetic / liquid feeds

A high-potash flowering feed on a regular cadence — UK: Tomorite (Levington), Phostrogen or a specialist rose feed; US: Miracle-Gro Bloom Booster or a rose food. Fast, reliable bloom response.

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 kalanchoe 'calandiva' — frequently asked questions

What fertiliser does kalanchoe 'calandiva' need?

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom. Kalanchoe 'Calandiva' is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

How often should I feed kalanchoe 'calandiva'?

Feed every two to four weeks during spring and summer growth with a balanced or high-potash liquid fertiliser diluted to half strength; high-potash feed supports flowering. Stop feeding in winter. Over-feeding produces lush leaves at the expense of blooms. Feed every two to four weeks during spring and summer growth with a balanced or high-potash liquid fertiliser diluted to half strength; high-potash feed supports flowering. Stop feeding in winter. Over-feeding produces lush leaves at the expense of blooms. For a hungry bloomer that means feeding regularly — sparingly through the growing season — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

What strength of feed for kalanchoe 'calandiva'?

What does over-feeding kalanchoe 'calandiva' look like?

Lots of lush leaves but few flowers (too much nitrogen). Scorched leaf edges and salt crust from too-strong or too-frequent feeds. Soft, sappy growth prone to aphids and mildew. Using a high-nitrogen general feed on kalanchoe 'calandiva' is the headline mistake — you grow a big leafy plant with few flowers. The second is simply under-feeding a genuinely hungry bloomer and getting a sparse, short display.

Should I flush the soil of kalanchoe 'calandiva'?