Fertilising guide
How to fertilise Philodendron Sharoniae (Philodendron sharoniae)— schedule & NPK
Also called Sharoniae, Sharon's Philodendron.
More about philodendron sharoniae
About Philodendron Sharoniae
Philodendron sharoniae · also called Sharoniae, Sharon's Philodendron · houseplant
A sought-after climbing philodendron with long, pendulous, deeply ribbed strap leaves that can reach over a metre on mature plants. Native to Mexican rainforests, P. sharoniae wants warmth, high humidity and a sturdy support to climb, where it develops its dramatic elongated, quilted foliage from smaller juvenile leaves.
Growth habit: Vigorous climbing aroid with aerial roots; on a moss pole it produces long, pendulous, deeply ribbed strap leaves that lengthen dramatically as the plant matures.
Watch for — Brown leaf edges: Dry air or salt buildup scorches the long blades. Raise humidity and flush the soil periodically to remove excess fertiliser salts.
What fertiliser philodendron sharoniae actually wants — and why
Philodendron Sharoniae is a genuinely hungry tropical — in bright warmth it pushes growth fast and rewards a regular half-strength balanced feed all season.
A balanced liquid feed (even N-P-K) or a slightly nitrogen-leaning foliage feed — this is a big-leaved foliage plant putting on real size, so it wants steady nitrogen for lush leaves, not a bloom formula.
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 philodendron sharoniae: 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 philodendron sharoniae, 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 philodendron sharoniae:
Feed every two to four weeks during spring and summer with a balanced liquid fertiliser at half strength to fuel its large foliage. Reduce in autumn and stop in winter when growth slows. For a fast grower like this that means feeding regularly — about sparingly through the growing season — right through spring through early autumn (roughly March to September), tapering off only as light drops in autumn.
The dormant-season rule matters more than the exact interval: skip feeding entirely when philodendron sharoniae 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 philodendron sharoniae
Half strength every feed is the sweet spot for philodendron sharoniae: frequent enough to fuel fast growth, dilute enough that it never scorches even when you feed often.
Feeding always goes onto already-damp soil, never dry roots — water philodendron sharoniae first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the philodendron sharoniae watering schedule.
Signs you are over-feeding philodendron sharoniae
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for philodendron sharoniae:
- Brown, scorched leaf tips and margins despite correct watering.
- A white salt crust on the soil or around the pot edge.
- Sudden leaf yellowing and drop shortly after a strong feed.
- Soft, weak, over-stretched growth that cannot support itself.
Signs you are under-feeding philodendron sharoniae
- New leaves coming in noticeably smaller than older ones.
- Pale, yellow-green older leaves and slow growth through peak summer.
- A general loss of vigour and gloss in a plant that should be racing away.
If the symptoms point at watering, light or roots rather than nutrition, the full philodendron sharoniae care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Because you feed often, salts accumulate faster — flush the pot of philodendron sharoniae with plain water until it drains freely roughly every month through the feeding season to keep the root zone clean.
Organic vs synthetic feeds for philodendron sharoniae
Organic options
A diluted seaweed or fish-and-seaweed feed plus a yearly top-dress of worm castings supports fast growth without burn risk. UK: Westland seaweed or Baby Bio Organic; US: Neptune's Harvest or Espoma Indoor!.
Synthetic / liquid feeds
A balanced houseplant liquid at half strength applied frequently — UK: Baby Bio, Phostrogen or Westland Houseplant Feed; US: Miracle-Gro Indoor Plant Food or Dyna-Gro Foliage-Pro for steady leafy growth.
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 philodendron sharoniae — frequently asked questions
What fertiliser does philodendron sharoniae need?
A balanced liquid feed (even N-P-K) or a slightly nitrogen-leaning foliage feed — this is a big-leaved foliage plant putting on real size, so it wants steady nitrogen for lush leaves, not a bloom formula. Philodendron Sharoniae is a genuinely hungry tropical — in bright warmth it pushes growth fast and rewards a regular half-strength balanced feed all season.
How often should I feed philodendron sharoniae?
Feed every two to four weeks during spring and summer with a balanced liquid fertiliser at half strength to fuel its large foliage. Reduce in autumn and stop in winter when growth slows. Feed every two to four weeks during spring and summer with a balanced liquid fertiliser at half strength to fuel its large foliage. Reduce in autumn and stop in winter when growth slows. For a fast grower like this that means feeding regularly — about sparingly through the growing season — right through spring through early autumn (roughly March to September), tapering off only as light drops in autumn.
What strength of feed for philodendron sharoniae?
Half strength every feed is the sweet spot for philodendron sharoniae: frequent enough to fuel fast growth, dilute enough that it never scorches even when you feed often.
What does over-feeding philodendron sharoniae look like?
Brown, scorched leaf tips and margins despite correct watering. A white salt crust on the soil or around the pot edge. Sudden leaf yellowing and drop shortly after a strong feed. Soft, weak, over-stretched growth that cannot support itself. The mistake here is the opposite of most houseplants: under-feeding a fast tropical in peak season starves it, leaving small, pale new leaves and slow growth — but full-strength doses still burn it, so feed often and weak, not occasionally and strong.
Should I flush the soil of philodendron sharoniae?
Because you feed often, salts accumulate faster — flush the pot of philodendron sharoniae with plain water until it drains freely roughly every month through the feeding season to keep the root zone clean.
Keep reading
- Philodendron Sharoniae care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water philodendron sharoniae — 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