@fBoyle-- Meadow saffron has to be planted in August if seeds are used. Of course the seeds will not germinate if the weather is cold.
Also, it takes at least four years for the plant to flower after seeds have been planted. The bulbs will form but they will not flower for quite a while. The plant prefers sandy soil with average moisture.
Animals shouldn't eat the foliage or meadow saffron because it really is poisonous. Meadow saffron grows in our area and some cattle got ill after eating it.