Start with the bulb's character. It should be growing well with at least seven leaves. It should be healthy with no diseases and not more than a few small nibbles from pestws and no infestations. This works very well with the large flower/large bulb types and the small bulb types from South Africa. It does not do as well with cybister hybrids [sometimes less than 25% rebloom success) although if it does not bloom it will just revert to its normal bloom time the next spring. Usual success rates with other than cybister hybrids is above 80%. I have no data for you on species.

Step by step Technique.
Unplant[pick] your chosen bulb.
Lay it on its side on the ground/lawn part sunshade or indoors with a window or greenhouse for 5 days [does not matter if it rains].
DO NOT CUT LEAVES or roots= VERY IMPORTANT.
After 5 days, replant.
In yard/garden widest part of the bulb
is the soil line with a 4 inch tile
buried immediately the base of the bulb.

In a 10 or more inch pot plant only the
roots with the bulb resting on the soil
surface using a fairly tight soil mix
of at least 50% sand with good drainag.
You want plenty of soil to anchor the
roots.
Water immediately and every 3 weeks. Do not let drain
water stand in the saucer under the pot.
Keep your pot in front of a sunny window and look at it
at least twice per day.

Now that you can make it bloom let us look at timing.
From picking day it is 5 days [or 4 or 7 or 8 if you
have to go out of town for a weekend. I tested at 1, 5,
15, & 30 days. At 30 days I sometimes saw some leaf
yellowing. At 15 days I sometimes saw sliglimpness in
leaves.
5 days
From replanting day different have different time for
planting to bloom. Hadeco's Joker takes about 20 days.
I use 39 days as my base planting to bloom # of days
for most garden type [big bulb/buig flower].
39 days

So subtract about 47 days from the holiday, birthday, anniversary, office party, or celebration you are aiming for. The extra days are to have fuller bloom at event.

Mark your calendar for Unplanting/picking day, Replanting day, Blooming/event day.

Email me at amstgrp@yahoo.com with your pictures, successes, questions, comments.

You are now working in a new area of the bloom/growth cycle
. Botanists & Cornell UNIV. don't know this. They don't know this yet in Holland, Brazil, Thailand, China,
E. William Warren, Amaryllis Study Group

[In yard/garden widest part of the bulb is the soil line with a 4 inch tile
buried immediately the base of the bulb.]

I plant my bulbs 8 inches apart from centre to centre. You recommend a bed having 4 inch tiles 1.5 inches below the soil surface spaced 4 inches apart and the bulb resting on the tile. The roots will spread on the tile and dip down in that 4 inch space shared by two bulbs.
PLEASE EXPLAIN THE LOGIC BEHIND IT

[Keep your pot in front of a sunny window and look at it
at least twice per day.]
Would looking at it four time a day be more beneficial?
Regards
Arif