Glass Jar Garden

Plants

Neoregelia 'Fireball' as drawn in the simulator

Neoregelia 'Fireball'

Neoregelia 'Fireball'

EasyFine in a closed jar

A small bromeliad that blushes red in bright light. Keep its cup filled.

What the simulation uses

Light
8,000 to 25,000 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 32 °C
Comfortable range; outside it growth slows.
Dies at
below 4 or above 38 °C
Days beyond these temperatures kill it.
Soil pH
5 to 6.5 pH
Soil acidity it prefers.
Grows up
0.35 cm/month
How fast it gains height in good conditions.
Spreads
1 cm/month
How fast its edge creeps outwards.
Copes with wet
fair
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
good
How well it survives the jar drying out.
Water use
0.06 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
2 %/month
Share of its leaves it sheds each month as litter for the cleanup crew.
Soft leaves
no
Soft new growth that hungry isopods will nibble.
Full size
11.5 cm tall, 15 cm wide
Its size when grown, before the lid stops it.

Care

Day length
12 to 14 h
Substrate
Moist

What kills it

Description

In dim light the red fades back to green, so give it a bright spot. Keep the central cup topped up with soft water. Mount it on wood or plant it in airy bark, since dense wet soil rots the roots.

Also called mini bromeliad, fireball bromeliad.

Estimated, where sources were thin: mature_size_cm for 'Fireball' specifically; light_lux; growth rates; ph.

Sources

Grow it in a jar