Repotting guide

When & how to repot Philodendron Maximum (Philodendron maximum)

Also called Maximum Philodendron, Giant Philodendron.

More about philodendron maximum

About Philodendron Maximum

Philodendron maximum · also called Maximum Philodendron, Giant Philodendron · houseplant

Philodendron maximum is an aptly named giant species producing huge, glossy, deeply ribbed and rippled heart-shaped leaves that can reach a metre or more on mature climbing plants. A bold statement aroid, it needs space, a sturdy support, warmth, high humidity and bright indirect light to develop its dramatic full-size foliage.

Mature size: Indoors commonly 1.5-2.5 m (5-8 ft) tall on a sturdy support, with mature leaves reaching 60 cm-1 m (24-40 in) or more in length; larger still in ideal greenhouse conditions.

Watch for — Yellowing leaves: Typically overwatering or poor drainage. Let the top of the soil dry between waterings and confirm the pot drains freely.

How to tell philodendron maximum needs repotting

Repotting on a calendar is less reliable than reading the plant. For philodendron maximum, watch for these signs:

Roots poking out of the drainage holes or coiling visibly around the inside of the pot.
You are watering far more often than you used to because the rootball dries out within a day or two.
Water runs straight through and out the bottom without soaking in.
Top growth has slowed or new philodendron maximum leaves are noticeably smaller than older ones despite good light.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot philodendron maximum

Every 12–18 months — sooner if roots show fast. Philodendron Maximum's growth habit — a large climbing philodendron that scrambles upward on aerial roots, producing ever-larger heart-shaped leaves with rippled margins as it matures on a sturdy support. it needs a strong moss pole and considerable space; unsupported it sprawls widely. — sets the pace. Philodendron maximum is an aptly named giant species producing huge, glossy, deeply ribbed and rippled heart-shaped leaves that can reach a metre or more on mature climbing plants. A bold statement aroid, it needs space, a sturdy support, warmth, high humidity and bright indirect light to develop its dramatic full-size foliage.

What size pot to step philodendron maximum up to

Step up one pot size — about 2–3 cm (an inch) wider. Philodendron Maximum grows fast, so it will fill that space within a season, but jumping several sizes at once still backfires: the unused soil stays soggy and rots even a vigorous root system. One size at a time, every year or so, is the rhythm.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot philodendron maximum

Early spring, just as new growth restarts, is the ideal window for philodendron maximum. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting philodendron maximum

Time it for spring. Repot philodendron maximum in early spring as growth restarts so it re-roots quickly into the fresh soil.
Choose one size up. Pick a pot about 2–3 cm wider with drainage holes. One step only — a much bigger pot stays soggy and rots roots.
Ease the plant out. Water lightly the day before, then tip philodendron maximum out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh well-draining aroid mix in the new pot, set the plant so its soil line is unchanged, and backfill, firming lightly.
Water and pause feeding. Water once to settle the soil. Hold off fertiliser for about a month — fresh mix already has nutrients and feeding now burns new roots.

Aftercare

Water philodendron maximum once to settle the soil, then let the surface dry before watering again — fresh mix around the roots stays wetter than the old compacted ball, so the commonest post-repot mistake is overwatering. Keep it out of direct sun for a week or two while roots re-establish. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for philodendron maximum

Philodendron Maximum wants well-draining aroid mix. A chunky blend of potting soil, orchid bark, perlite and coco coir gives the drainage and aeration this vigorous giant needs. Its robust root system dislikes dense, water-retentive soil that stays soggy. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting philodendron maximum — frequently asked questions

How often should you repot philodendron maximum?

Every 12–18 months — sooner if roots show fast for philodendron maximum. Repot philodendron maximum roughly every 12–18 months, in early spring as growth restarts. It grows fast and circles its pot quickly, so step up one size (about 2–3 cm wider) into fresh well-draining aroid mix. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does philodendron maximum need?

When is the best time of year to repot philodendron maximum?

Can you put philodendron maximum straight into a much bigger pot?

No. Even a fast-growing philodendron maximum should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise philodendron maximum after repotting?

Not immediately. Wait about 4 weeks after repotting philodendron maximum. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.