Question 1

When does the Grannom Caddis hatch occur?

Accepted Answer

The Grannom Caddis (Brachycentrus spp.) hatch runs from April through May across Eastern US rivers, with peak activity typically in April or May. Earlier on lower-elevation southern rivers, later on northern and high-elevation streams.

Question 2

What flies match the Grannom Caddis hatch?

Accepted Answer

Standard Grannom Caddis fly patterns include Elk Hair Caddis #14-16, Henryville Special #14-16, LaFontaine Sparkle Pupa #14, Green-bodied Caddis Nymph #14. First major caddis emergence of the year. Look for clouds of small dark caddis above riffles in late afternoon.

Question 3

What water temperature triggers the Grannom Caddis hatch?

Accepted Answer

Grannom Caddis emergence triggers at water temperatures of 52–62°F, with peak activity around 56°F. Read your thermometer, not your calendar.

Question 4

What time of day does the Grannom Caddis hatch?

Accepted Answer

The Grannom Caddis hatch typically emerges in the afternoon. Plan your fishing window around that — being on the water before the emergence starts is more important than being on the water early in general.

Grannom Caddis

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