Soil & potting mix
Best soil for Port St. Johns Creeper (Pandorea ricasoliana)
Also called Port St. Johns Creeper, Pink Trumpet Creeper.
More about port st. johns creeper
About Port St. Johns Creeper
Pandorea ricasoliana · also called Port St. Johns Creeper, Pink Trumpet Creeper · tropical
A striking South African twining climber in the Bignoniaceae family, producing generous clusters of soft rose-pink trumpet flowers through summer and autumn. Valued for its vigour, glossy evergreen foliage, and tolerance of coastal conditions. Suits warm, frost-free gardens where it will rapidly clothe walls, pergolas, and fences.
Preferred mix: Well-drained loam to sandy loam
Why port st. johns creeper needs this mix
Port St. Johns Creeper is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Port St. Johns Creeper is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
- A little perlite or bark stops ordinary compost compacting into an airless block over time, which is the slow, common cause of decline.
- It is not fussy about pH or special ingredients; getting the air-to-moisture balance right is what matters.
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 port st. johns creeper struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates port st. johns creeper's roots.
- A pure peat mix that dries to a hard, water-repelling block is hard to re-wet and stresses the plant.
- No drainage hole turns even a good mix into a stagnant, root-rotting sump.
Reusing tired, compacted old compost or skipping the perlite. A free-draining mix in a pot with a hole solves most "why is it struggling" cases for port st. johns creeper.
pH — does it matter for port st. johns creeper?
Port St. Johns Creeper is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
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 decent bagged houseplant compost works for port st. johns creeper as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Drainage and the pot
A pot with a drainage hole and a saucer you empty after watering is all port st. johns creeper needs — the free-draining mix does the rest.
Refresh port st. johns creeper's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. When the time comes, our repotting guide for port st. johns creeper covers the timing and technique step by step.
Port St. Johns Creeper soil — frequently asked questions
What is the best soil mix for port st. johns creeper?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Port St. Johns Creeper is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
Can I use normal potting soil for port st. johns creeper?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates port st. johns creeper's roots. A decent bagged houseplant compost works for port st. johns creeper as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Does port st. johns creeper need a special pH?
Port St. Johns Creeper is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
Should I buy a bagged mix or make my own for port st. johns creeper?
A decent bagged houseplant compost works for port st. johns creeper as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
How often should I refresh the soil for port st. johns creeper?
Refresh port st. johns creeper's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. A pot with a drainage hole and a saucer you empty after watering is all port st. johns creeper needs — the free-draining mix does the rest.
Keep reading
- Port St. Johns Creeper care — the full brief (light, water, humidity, problems, pet safety)
- How often to water port st. johns creeper — the schedule the mix feeds into
- Repotting port st. johns creeper — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Should I water my plant? The simple check first
- Overwatered plant — signs and recovery
- Root rot — how the wrong soil starts it, and how to save the plant
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- All 8452 soil and potting-mix guides in the Growli library