Soil & potting mix
Best soil for Hoya Krimson Princess (Hoya carnosa 'Krimson Princess')
Also called Krimson Princess wax plant, Hoya carnosa 'Rubra', variegated wax plant, porcelain flower.
More about hoya krimson princess
About Hoya Krimson Princess
Hoya carnosa 'Krimson Princess' · also called Krimson Princess wax plant, Hoya carnosa 'Rubra' · houseplant
Hoya Krimson Princess is a trailing wax-plant cultivar prized for waxy leaves with creamy-pink inner variegation and clusters of fragrant, star-shaped flowers. Give it bright indirect light, let the soil dry almost fully between waterings, and warmth above 10C. The ASPCA lists Hoya carnosa as non-toxic to cats and dogs.
Preferred mix: Loose, very well-draining aroid- or orchid-style mix
Watch for — Yellowing leaves: Almost always a sign of overwatering or poor drainage - let the soil dry out more between waterings and check that the pot drains freely.
Why hoya krimson princess needs this mix
Hoya Krimson Princess is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Hoya Krimson Princess 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 hoya krimson princess 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 hoya krimson princess'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 hoya krimson princess.
pH — does it matter for hoya krimson princess?
Hoya Krimson Princess 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 hoya krimson princess 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 hoya krimson princess needs — the free-draining mix does the rest.
Refresh hoya krimson princess'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 hoya krimson princess covers the timing and technique step by step.
Hoya Krimson Princess soil — frequently asked questions
What is the best soil mix for hoya krimson princess?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Hoya Krimson Princess 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 hoya krimson princess?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates hoya krimson princess's roots. A decent bagged houseplant compost works for hoya krimson princess 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 hoya krimson princess need a special pH?
Hoya Krimson Princess 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 hoya krimson princess?
A decent bagged houseplant compost works for hoya krimson princess 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 hoya krimson princess?
Refresh hoya krimson princess'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 hoya krimson princess needs — the free-draining mix does the rest.
Keep reading
- Hoya Krimson Princess care — the full brief (light, water, humidity, problems, pet safety)
- How often to water hoya krimson princess — the schedule the mix feeds into
- Repotting hoya krimson princess — 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
- Best soil for snake plant
- Best soil for dracaena
- Best soil for peperomia
- All 389 soil and potting-mix guides in the Growli library