I took a moment out from work on the May/June issue of The Essential Herbal magazine yesterday, specifically to record what is going on outside.
Mid-March looks suspiciously like late April. Above, you'll see that our Rosemary didn't just survive this year, it is preparing to bloom. Echinacea is coming up. We are way past worrying about a frost - if it happens, there's nothing we can do to save the peaches, apples, blueberries, and cherries that are starting to bloom already. Gooseberries had tiny buds on Saturday that burst into leaves yesterday. Many years, we are still under snow at this point, however we've already had a month of warm weather. Elderberry is busting out all over. The furnace hasn't run in weeks, and the windows have been open daily. Comfrey is starting to grow through the debris from last autumn.
The "lawn" is full of speedwell, purple dead nettle, and shepherd's purse. It will need a good mow, which usually happens for the first time each year in late April or early May.
The easiest way for me to put a time-table on this is to remember that as a child looking for blossoms for May Day bouquets, there might be a few violets, perhaps some dogwood, and dandelions. This year, I can only imagine what will be blooming by May. We have a full week of 70's forecasted ahead. Could it possibly be that our last frost was in February?