Winter groundbait

Winter groundbait isn't a separate product — it's the same mix, made poorer and finer. What changes isn't the raw material but the ratio: less of what fills the fish up, more of what sends a signal.

Why the mix is made poorer

Cold water lowers the fish's need for food, and that's corrected two ways: giving less, or putting less nutrition into the same volume. The first is tactics, covered in the card on baiting the ice hole. The second is composition, and that's what this card is about: the winter mix is made poorer back on the bank, not fixed with quantity on the ice.

What gets taken out

First of all, non-live coarse fraction — grain and boiled cereals: just enough of it is left for the fish to have something to find. The live fraction stays, and more on that below.

Soil is trickier. It still adds weight in winter — the physics is the same — but there's no use for that weight: falling through an ice hole is already vertical. What it does do is make the mix poorer, and that's exactly what's wanted from a winter mix. So it's still added in winter, but now for the poorness.

What stays central

Fine fraction and a live component. Bloodworm here works as both feed and signal: it wriggles, and in still cold water that movement stays noticeable longer than anything else in the mix.

Why the fine fraction works longer

Horizontally, the signal barely travels in winter: it spreads worse in cold water than in summer, so the feed only works right under the hole. But vertically it holds longer — a fine particle settles more slowly than in warm water, and the signal holds in the water column under the hole. Because of this, less fine feed is needed in winter than summer habit suggests.

Frost changes moisture

In freezing temperatures the water in the mix turns to ice, and a mix that balled up properly in the morning goes down as a lump by evening. That's why a winter mix is moistened more sparingly than a summer one, kept covered, and brought up to moisture on site, in small amounts at a time.

What this card doesn't cover

About tactics: how many holes to prepare, in what order to work them, and how the feed is lowered under the ice — that's the ice-fishing section, the card ‘Baiting the ice hole’. And about ice strength — that's ice safety, a topic with its own sources and its own restrictions.