The Main Plant entry for Peruvian Lilies (Alstroemeria)

"Many hybrids and about 190 cultivars have been developed, with different markings and colors, ranging from white, golden yellow, and orange, to apricot, pink, red, purple, and lavender. The most popular and showy hybrids commonly grown today result from crosses between species from Chile (winter-growing) with species from Brazil (summer-growing). This strategy has overcome the problem of seasonal dormancy and resulted in plants that are evergreen, or nearly so, and flower for most of the year. This breeding work derives mainly from trials that began in the United States in the 1980s. The flower, which resembles a miniature lily, is very popular for bouquets and flower arrangements in the commercial cut flower trade. It has a vase life of about two weeks. It is sometimes also called 'Ulster Mary' (a corruption of the genus name).

Most cultivars available for the home garden will bloom in the late spring and early summer. The roots are hardy to a temperature of 23 °F (−5 °C). The plant requires at least six hours of morning sunlight, regular water, and well-drained soil."

Taken from wikipedia's page at: http://en.wikipedia.org/wiki/A...

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Daisy found this T&M article with detailed advice about getting Alstroemeria seeds to germinate.
Warm-cold-warm moist stratification.

http://garden.org/thread/view_...
http://www.thompson-morgan.com...

This gave them fairly good results with moist seeds:
60F for 2 weeks
Refrigerator for two weeks - 40F
Then 50F

Then it suggests a lot of detail that boils down to:
3 seeds in a cup of moist mix, covered with plastic film.
70F for three weeks
40F for three weeks.
Then 70F again. Expect germination in 10 to 14 days,
Don't try to separate seedlings, they have fussy roots. Plant as a clump if necessary.

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