Heartleaf philodendron (Philodendron hederaceum)
Also called Efeu-Philodendron, Heartleaf philodendron, Herzblatt-Philodendron, Samtblatt-Philodendron
At a glance
Forms and cultivars 3
Each form shows its light value and where it was measured: ● on this form itself, ○ on the form or species named in the line. Grades: A Measured directly, B Indirect, C Distant.
Yellow-variegated 1
Brasilfrom £8.99
Still grows at 20, saturates at 330 µmol/m²/s · measured on green Philodendron hederaceum C
Single-color yellow 1
Lemon Limefrom £15
Still grows at 20, saturates at 330 µmol/m²/s · measured on green Philodendron hederaceum C
Green 1
Still grows at 20, saturates at 330 µmol/m²/s · measured on green Philodendron hederaceum C
Light
Still grows at 20 · saturates at 330 µmol/m²/s
Measured on this species B
- Still grows at
- very dim · ~1,100 lux
- Leaves saturate at
- some direct sun · ~18,000 lux
The light scale
Scale in µmol/m²/s, linear from 0 to 800. Lux are read as daylight: 1 µmol/m²/s is about 54 lux.
- Very dim: up to 25
- Dim to medium: 25–100
- Bright, no direct midday sun: 100–300
- Some direct sun: 300–700
- Direct sun: above 700
Cold
Plants of this species kept at a low temperature, one measurement per row.
| Temperature | Days | Light | Effect | Grade |
|---|---|---|---|---|
| 8 °C | 4 | Dark | No damage | A Measured directly |
| 5 °C | 3 | Dark | Damage from day 3 | A Measured directly |
| 2 °C | 2 | Dark | Damage from day 2 | A Measured directly |
Measured on this species
Care
Potting mix
Heart-leaf philodendron cuttings in watertight aluminium pots made about half the shoot growth of cuttings in clay or peat pots over 16 weeks (7.0 against 13.4–13.7 cm); the authors point to poorer aeration and drainage.
A Measured directlyMeasured on this species
Feeding
Heart-leaf philodendron in 15-cm pots fed 4.8–7.2 g Osmocote 19-6-12 per 3 months graded 4.4–4.6 of 5 in the glasshouse; plant and root grades fell as the rate rose further, to 3.4 and 3.1 at 24 g.
B IndirectMeasured on this species
In solution culture at 274 µmol, tripling the nitrogen concentration (5 to 15 meq/L) gave heart-leaf philodendron no extra growth (dry weight 4.6–5.2 g).
B IndirectMeasured on this species
Propagation
In a winter glasshouse, keeping the rooting medium at 24 °C or warmer raised the rooting grade of heart-leaf philodendron cuttings after 7 weeks from 2.1 to 2.8 on a 1–4 scale.
A Measured directlyMeasured on this species
Dipping heart-leaf philodendron cuttings in IBA or NAA left the share that rooted unchanged (86–91 % against 86 % undipped); IBA at 0.5 g/L gave longer roots after four months (13 against 7 cm).
A Measured directlyMeasured on this species
Sticking 10 or 15 tip cuttings of 'Frilly Philly' per 0.6-L pot instead of 5 gave fuller, better-rated pots after 12 weeks (quality 4.3–4.8 against 2.1 of 5).
B IndirectMeasured on this species