Glass Jar Garden

Plants

Cape sundew as drawn in the simulator

Cape sundew

Drosera capensis

BeginnerFine in a closed jar

Long leaves beaded with sticky dew. Easy, if it gets bright light and pure water.

What the simulation uses

Light
10,000 to 30,000 lux
The brightness it grows well in.
Humidity
50 to 90 % RH
Air moisture it is happy in; below the lower end it dries out.
Temperature
10 to 35 °C
Comfortable range; outside it growth slows.
Dies at
below -2 or above 40 °C
Days beyond these temperatures kill it.
Soil pH
4 to 5.5 pH
Soil acidity it prefers.
Grows up
1.25 cm/month
How fast it gains height in good conditions.
Spreads
1.25 cm/month
How fast its edge creeps outwards.
Copes with wet
excellent
How well it stands soggy soil; poor means rot comes quickly.
Copes with still air
good
Sealed jars have still air; poor means grey mould finds it.
Copes with shade
fair
How well it holds on in dim light.
Copes with drying
poor
How well it survives the jar drying out.
Water use
0.07 ml/cm²/day
Water drawn up from its roots per cm² of leaves in room air; a sealed jar cuts this to a fraction and returns it down the glass.
Leaf drop
3 %/month
Share of its leaves it sheds each month as litter for the cleanup crew.
Soft leaves
yes
Soft new growth that hungry isopods will nibble.
Full size
15 cm tall, 20 cm wide
Its size when grown, before the lid stops it.

Care

Day length
12 to 16 h
Substrate
Wet

What kills it

Description

Few carnivores are easier, and this subtropical sundew is among the best for a terrarium. Strong light brings out the sticky dew and red tints. Water only with rain or distilled water, and plant it in a poor peat and sand mix.

Also called sundew.

Estimated, where sources were thin: light_lux; ph; temp_lethal_c; humidity_rh_pct.

Sources

Grow it in a jar