Fertilising guide

How to fertilise Clematis 'Ernest Markham' (Clematis 'Ernest Markham')— schedule & NPK

Also called Ernest Markham clematis, magenta clematis.

More about clematis 'ernest markham'

About Clematis 'Ernest Markham'

Clematis 'Ernest Markham' · also called Ernest Markham clematis, magenta clematis · flowering

Clematis 'Ernest Markham' is a vigorous deciduous climber bearing rich glowing magenta-red flowers with a velvety sheen from midsummer into autumn. Usually grown as Pruning Group 3, it flowers on new wood and is cut back hard in late winter. It flowers most freely in plenty of sun, with the roots kept cool and shaded.

Growth habit: Vigorous deciduous twining climber clinging by leaf stalks, flowering freely on the current year's growth. Excellent for sunny walls, fences and scrambling through shrubs, and one of the longest-flowering reds.

What fertiliser clematis 'ernest markham' actually wants — and why

Clematis 'Ernest Markham' 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 clematis 'ernest markham': 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 clematis 'ernest markham', 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 clematis 'ernest markham':

Feed in early spring with a balanced fertiliser, then a high-potash feed such as tomato fertiliser every two to three weeks through budding and flowering. Mulch the roots each spring with compost to feed and keep them cool. 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.

The dormant-season rule matters more than the exact interval: skip feeding entirely when clematis 'ernest markham' 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 clematis 'ernest markham'

Follow the flowering-feed label rate for clematis 'ernest markham', 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 clematis 'ernest markham' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the clematis 'ernest markham' watering schedule.

Signs you are over-feeding clematis 'ernest markham'

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

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 clematis 'ernest markham'

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 clematis 'ernest markham' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown clematis 'ernest markham' 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 clematis 'ernest markham'

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 clematis 'ernest markham' — frequently asked questions

What fertiliser does clematis 'ernest markham' 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. Clematis 'Ernest Markham' 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 clematis 'ernest markham'?

Feed in early spring with a balanced fertiliser, then a high-potash feed such as tomato fertiliser every two to three weeks through budding and flowering. Mulch the roots each spring with compost to feed and keep them cool. Feed in early spring with a balanced fertiliser, then a high-potash feed such as tomato fertiliser every two to three weeks through budding and flowering. Mulch the roots each spring with compost to feed and keep them cool. 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 clematis 'ernest markham'?

What does over-feeding clematis 'ernest markham' 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 clematis 'ernest markham' 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 clematis 'ernest markham'?