This is winter now. Even though some days are fairly warm, keep the cold frame closed. Open it if there is a “warm” snow during the day, but close by nightfall. The average high temperature is 47 degrees; the average low is 24 degrees. The record high is 72 degrees; 3 degrees is the record low.

Watering: Same as November.

Fertilizing: None necessary.

Spraying: Dormant spray can be used again.

Trimming & Pruning: December, January and February are the best months to graft conifers.