A bitter cucumber is one of August’s sharper disappointments. The vine looks vigorous. The fruit is firm, green, and cool in the hand. Then the first slice tastes less like summer and more like warning. The flavor can seem mysterious because the fruit may look perfectly healthy. There is no rot, no obvious disease, no insect tunnel, no sunken scar.…
Powdery mildew often arrives looking almost harmless. A squash leaf that was green yesterday appears dusted with flour. A phlox stem has a pale bloom on its upper leaves. The cucumber patch still looks productive, the zinnias are still bright, and yet the garden has acquired a strange white weather of its own. The first instinct is usually to blame…
