今天给园子上了肥料，查了霜期

今天给园子上了肥料，是PREEN牌子的。说明书上说要在3个月后再上一次。也就是7月30号的时候。
还把蒲公英拔了一遍。

买了些花籽，有NASTURSIUM，PETUNIA，和MARIGOLD。准备趁春天种上花。明天准备买几颗CATAWBA RODODENDRON种在门前。

这里的最后一场春霜是在4/26，秋霜在10/9. (http://davesgarden.com/guides/freeze-frost-dates/).在室外种花籽要在最后一场霜后种才可以。

Each winter, on average, your risk of frost is from October 9 through April 26.

Almost certainly, however, you will receive frost from October 22 through April 11.

You are almost guaranteed that you will not get frost from May 10 through September 26.

Your frost-free growing season is around 166 days.