Basil

Pesto insurance: basil started indoors in early April, set out when nights finally warm, and pinched all summer. A cluster in a 5 gallon bag keeps pace with a tomato-heavy kitchen from June to frost.

Growing

Six weeks indoors from early April, but no rushing the move outside; basil sulks below 50F, so late May is the honest date, the same window as direct sowing. A single plant fits a 2 to 3 gallon bag, and a 5 gallon bag holds a small cluster. Harvest by cutting stems back to a leaf pair, which doubles the branches, and pinch every flower spike the moment it shows. Before the first cool nights of fall, cut hard; cold-checked leaves blacken first. A bag this small dries out fast; water evenly and in the morning, so the leaves go into the night dry.

Varieties

Genovese for the pesto standard. Prospera or Rutgers Obsession bring downy mildew resistance, which matters in a humid river valley; Siam Queen covers the Thai side.

Pests

Basil downy mildew blows in on humid air most summers; the tells are yellowing panels between leaf veins and gray fuzz underneath, and resistant varieties plus morning-only watering are the whole defense. Japanese beetles take lacy bites in July; pick them into soapy water before the day warms up and they can fly.

In the kitchen

Pesto in batches, frozen flat in bags and snapped off by the square all winter. Whole leaves belong on tomato sandwiches while both crops are running.