Soil & potting mix
Best soil for Nemesia strumosa 'Poetry Blue' (Nemesia strumosa 'Poetry Blue')
Also called Poetry Blue Nemesia, Blue Cape Jewels.
More about nemesia strumosa 'poetry blue'
About Nemesia strumosa 'Poetry Blue'
Nemesia strumosa 'Poetry Blue' · also called Poetry Blue Nemesia, Blue Cape Jewels · flowering
'Poetry Blue' is a compact South African Nemesia bearing masses of small two-lipped lavender-blue flowers over bushy foliage from late spring through summer. A cool-season bedding and container favourite, it flowers best in mild weather, likes sun with even moisture and rich soil, and reblooms strongly if trimmed back when the first flush tires.
Preferred mix: Fertile, humus-rich, moisture-retentive but free-draining compost
Watch for — Yellowing from drying out or alkaline soil: Leaves yellow when roots dry out or the soil is too alkaline. Maintain even moisture, use slightly acidic compost and feed regularly.
Why nemesia strumosa 'poetry blue' needs this mix
Nemesia strumosa 'Poetry Blue' hates drying out, so it wants a mix that stays evenly moist — but it still needs perlite so "moist" never tips into "waterlogged".
- Nemesia strumosa 'Poetry Blue' 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 nemesia strumosa 'poetry blue' 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 nemesia strumosa 'poetry blue' — 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 nemesia strumosa 'poetry blue' dry out. It needs a moisture-retentive but still airy blend.
pH — does it matter for nemesia strumosa 'poetry blue'?
Nemesia strumosa 'Poetry Blue' 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 nemesia strumosa 'poetry blue' 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 nemesia strumosa 'poetry blue''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 nemesia strumosa 'poetry blue' covers the timing and technique step by step.
Nemesia strumosa 'Poetry Blue' soil — frequently asked questions
What is the best soil mix for nemesia strumosa 'poetry blue'?
3 parts peat-free houseplant compost : 1 part coco coir : 1 part perlite. Nemesia strumosa 'Poetry Blue' 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 nemesia strumosa 'poetry blue'?
A free-draining, gritty mix dries too fast for nemesia strumosa 'poetry blue' — you get crispy brown edges and frond or leaf drop within days of one missed watering. A good peat-free houseplant compost works for nemesia strumosa 'poetry blue' 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 nemesia strumosa 'poetry blue' need a special pH?
Nemesia strumosa 'Poetry Blue' 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 nemesia strumosa 'poetry blue'?
A good peat-free houseplant compost works for nemesia strumosa 'poetry blue' 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 nemesia strumosa 'poetry blue'?
Peat-free mixes slump and compact as they hold moisture, so refresh nemesia strumosa 'poetry blue''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
- Nemesia strumosa 'Poetry Blue' care — the full brief (light, water, humidity, problems, pet safety)
- How often to water nemesia strumosa 'poetry blue' — the schedule the mix feeds into
- Repotting nemesia strumosa 'poetry blue' — 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
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