"Soil Type. Soils that are well drained with high organic matter is best for optimal growth. However, brussel sprouts may be grown on a variety of soils. Earlier crops are planted on light, sandier soil, while high yielding crops are planted in heavier soil. Liming the soil to a pH to make nutrients most available is recommended; however, brussel sprouts can tolerate a more acidic environment than other vegetables of this family.
Temperature. Brussel sprouts are a cool season crop that grows best between 45 and 75°F with optimal growth at 60 to 65°F. Brassicas can withstand some freezing.
In warm weather, sprouts become loose, forming more open heads, while cool weather firms the sprouts and leads to a milder flavor."
And don't forget that the tops are gourmet. = Tim