Soil & potting mix
Best soil for Pink Calla Lily (Zantedeschia rehmannii)
Also called Pink Calla Lily, Pink Arum, Rehmann's Calla.
More about pink calla lily
About Pink Calla Lily
Zantedeschia rehmannii · also called Pink Calla Lily, Pink Arum · flowering
Zantedeschia rehmannii is the original pink calla lily native to eastern South Africa, producing slender, lance-shaped leaves and elegant funnel-shaped spathes in shades of soft pink to deep rose. It grows from rhizomes, thrives in moist to wet conditions, and suits containers, borders, and cutting gardens. Toxic to pets due to calcium oxalate; dies back to rhizome in winter.
Preferred mix: Moisture-retentive, fertile loam or loam-free compost
Watch for — Rhizome rot: Overwatering during or especially after the growing season causes rhizome rot. Ensure excellent drainage in containers and allow the rhizome to dry off completely during winter dormancy. In cold, wet climates, lift and store rhizomes frost-free.
Why pink calla lily needs this mix
Pink Calla Lily hates drying out, so it wants a mix that stays evenly moist — but it still needs perlite so "moist" never tips into "waterlogged".
- Pink Calla Lily comes from damp, shaded forest floors and has fine roots that scorch and brown the moment the rootball dries — the mix has to hold a steady reserve.
- Coir and compost give that reserve, while perlite keeps enough air that the constantly-moist mix does not turn anaerobic.
- Even moisture also keeps its thin leaves from crisping at the edges, which is this plant’s most visible stress signal.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons pink calla lily struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- A free-draining, gritty mix dries too fast for pink calla lily — you get crispy brown edges and frond or leaf drop within days of one missed watering.
- A pure, airless peat mix swings the other way: it holds water but suffocates the fine roots and rots the crown.
- Letting the mix dry to the point it shrinks from the pot is very hard to re-wet evenly and stresses the plant badly.
Using a sharp, fast-draining "houseplant" or cactus-leaning mix that lets pink calla lily dry out. It needs a moisture-retentive but still airy blend.
pH — does it matter for pink calla lily?
Pink Calla Lily prefers a slightly acidic mix (around pH 5.5-6.5); a peat-free compost-and-coir blend sits there naturally, so routine pH testing is unnecessary.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
A good peat-free houseplant compost works for pink calla lily straight from the bag if you mix in some perlite for air. The DIY ratio above gives a more reliable moisture-to-air balance.
Drainage and the pot
Use a pot with a drainage hole but a less-porous material (plastic or glazed) so it does not dry too fast. Bottom-watering keeps the mix evenly moist without sogging the crown.
Peat-free mixes slump and compact as they hold moisture, so refresh pink calla lily's mix every 12-18 months to keep air in the rootball even if the pot size is unchanged. When the time comes, our repotting guide for pink calla lily covers the timing and technique step by step.
Pink Calla Lily soil — frequently asked questions
What is the best soil mix for pink calla lily?
3 parts peat-free houseplant compost : 1 part coco coir : 1 part perlite. Pink Calla Lily comes from damp, shaded forest floors and has fine roots that scorch and brown the moment the rootball dries — the mix has to hold a steady reserve.
Can I use normal potting soil for pink calla lily?
A free-draining, gritty mix dries too fast for pink calla lily — you get crispy brown edges and frond or leaf drop within days of one missed watering. A good peat-free houseplant compost works for pink calla lily straight from the bag if you mix in some perlite for air. The DIY ratio above gives a more reliable moisture-to-air balance.
Does pink calla lily need a special pH?
Pink Calla Lily prefers a slightly acidic mix (around pH 5.5-6.5); a peat-free compost-and-coir blend sits there naturally, so routine pH testing is unnecessary.
Should I buy a bagged mix or make my own for pink calla lily?
A good peat-free houseplant compost works for pink calla lily straight from the bag if you mix in some perlite for air. The DIY ratio above gives a more reliable moisture-to-air balance.
How often should I refresh the soil for pink calla lily?
Peat-free mixes slump and compact as they hold moisture, so refresh pink calla lily's mix every 12-18 months to keep air in the rootball even if the pot size is unchanged. Use a pot with a drainage hole but a less-porous material (plastic or glazed) so it does not dry too fast. Bottom-watering keeps the mix evenly moist without sogging the crown.
Keep reading
- Pink Calla Lily care — the full brief (light, water, humidity, problems, pet safety)
- How often to water pink calla lily — the schedule the mix feeds into
- Repotting pink calla lily — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Underwatered plant — signs and how to rehydrate it
- Why is my plant wilting? Wet vs dry diagnosis
- Should I water my plant? The simple check first
- Best soil for cosmos
- Best soil for salvia
- Best soil for lupine
- All 8452 soil and potting-mix guides in the Growli library