meteorologist and avid veggie gardener
By: georgevandenberghe, 5:39 PM GMT on August 19, 2013
Much of August in the DC area has been cool compared with recent Augusts but not
exceptional compared with the 20'th century ones. The midmonth
coolness though has been very beneficial in the garden esp. since
(like the March 2012 warmth) the GFS handled it fairly well and
I actually acted based on long range forecasts.
I'm about three weeks ahead of expectations with Brussels Sprouts, two
weeks ahead with peas and lettuce, and a week ahead with broccoli (set back by a groundhog).
The early boost to fall cool season crops is substantial.
It does not look like this will be the year for August 1 planted sweetcorn seeds to mature. An experiment in outrageous follies, planting 12" sweetpotato plants August 5, is (even more) at risk if I don't get more heat. (these aren't slips, they are bigger plants
from slips started June 10 which I didn't get to planting and
put in bigger pots July 20 to grow out initial roots so they do have a shot at making at least 8 ounce roots)