Most bottle gardens are very easy to care for and require very little attention. Maintaining a steady environment is the first key to keeping plants lush and green. The next best care secret is to use your own judgment. Here are some guidelines to help you on the way.
Light
Gardens do best in a bright location with indirect light. No dreary dark corners and no sun seared windowsills. A bit of early morning (before 10) or late afternoon (after 4) sun is fine. The plants also do quite well under florescent lights. Turning them often will help ensure even growth, but if they start to get tall and lanky, they need more light. Likewise, to much light causes excess heat to build up in the interior of a bottle, resulting in cooked plants.
Water
Bottles require only a few squirts from a mister every 1 to 2 months. Using distilled water will minimize spots on the glass. They may need more frequent misting in the summer and a bit less in the winter. Observing the media layers is a good way to determine when watering is needed. Water should be visible in the gravel layer when moisture is ideal, and dryer soil is lighter in color and requires watering. Condensation or fog on the glass is normal, and increases when there is a suddem change in room temperature. Be mindful. Overwatering is more dangerous than underwatering.
Temperature
The ideal temperature range is from 65°-75°F, but the plants can tolerate from 45°-95°F for short
periods. If the gardens stay too long outside of the ideal range, or venture into it too often, the result
is algae, mold and fungus. Avoid drastic fluctuations, even if they are within range. Maintaining a
steady environment is crucial.
Cleaning
Simple maintenance is all that should be needed, and not often. Overgrown moss and liverworts may be
trimmed or gently patted down with a dowel rod or other such instrument. Glass may be cleaned
with paper towel, both inside and out. To reach the interior the towel can be wrapped around a
chopstick. Paint brushes and Q-tips are also quite helpful. A razor blade attached to
a stick can be useful for trimming larger plants. Be creative, but do not
use cleaning products as these might kill the plants. For some of
my maintenance tools, please look here: Novelties
Insects
Insect infestations are not usually a problem with bottle
gardens. When you received your garden, it probably came
with a healthy population of springtails. These tiny bugs are
decomposers and are a sign that your garden is well balanced.
Do not attempt to kill them off. They will not venture out of
the bottle. Now, if you want more insects, I have found a
few other bugs that thrive in these environments.
Pillbugs and millipedes love the stagnant and
humid conditions. They are decomposers so
do not remove old leaves if you add them to
your garden. Centipedes also do quite well.
As carnivores, one can watch them hunt
and catch springtails, keeping the
population in check. Long-legged
house centipedes do not do well, it
is the shiny copper ones found under
rocks that flourish in the humidity.
HAPPY GARDENING!