Pot size: Select a pot so there is 1 inch of space between the bulb
and the side of the pot. Amaryllis bulbs like to be pot-bound to grow
and bloom. The small amount of potting mix around the bulb also
dries out quickly so the bulb doesn't set too long in wet or moist
conditions. This can encourage root and bulb rot.

Plastic vs. Clay pots: We use plastic pots because they hold more
moisture and we don't have to water as often as with clay pots.
Decorative glazed pots hold moistuer like plastic pots and provide
more bottom weight for those heavy blooms. We suggest that you
use a plastic pot and simply slip it into a decorative clay pot. By doing
so, you can rotate your blooming plants and not have to purchase a
decorative pot for each. Whatever pot you decide to use, make sure it
has good drainage. Your Amaryllis will not like setting in water, which
can easily rot the roots and bulb.

Potting Mix: We use the same mix for our Amaryllis that we do for
our African Violets: One part vermiculite, one part grade 4 perlite and
one part milled sphagnum peat moss. Never use garden soil, as
this will soon become clay and very detrimental to your plant. Most
standard potting mixes sold over the counter at nurseries and
garden departments, are heavy on the milled sphagnum peat moss
in their mix. Many people find these mixes to hold too much water
and their Amaryllis bulbs rot. We suggest adding perlite to these
mixes, if you choose to use them. We sell both the African Violet mix
and perlite in our web store at
http://www.store.orchidenterprise.com

How to pot: Bury the bulb in your potting mix leaving the top 1/3 of the
bulb above the soil surface and 1/2 to 1 inch of space between the
soil surface and the top of the pot. This space allows for water to
collect when being water. Again, the inside wall of the pot should be,
no more than, 1 inch from the side of the bulb.

Repotting: Repot every year.  Many people will remove the old potting
mix after the bulb goes dormant in the fall. We prefer waiting until
spring.  This allows the roots to continue absorbing moisture out of
the mix and helps buffer the bulbs from damage and undue
moisture loss.  If the mix becomes wet, or your storage area
becomes too humid,  the bulbs may rot.  If this is the case, you may
need to remove the mix in the fall.  

            
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Amaryllis Culture Guide
Potting
Provided by: Orchid Enterprise Inc.