Indian home cooking rotates its vegetables through the year even where every vegetable is available every month. The recipes themselves assume produce at a specific stage of ripeness and water content.
Dishes are calibrated to a particular condition
Winter carrots in northern India are sweeter and lower in water than the storage carrots available at other times, and preparations built on them assume that starting point.
Using a wetter, less sweet carrot in the same recipe means more liquid to cook off and less sugar to work with. The method produces a different result rather than a slightly worse one.
The same applies to green peas, raw mangoes, gourds and the leafy greens that appear only in cool weather. Each dish was tuned to produce that arrived in one condition.
Out-of-season supply is a different product
Produce grown for long-distance shipping is bred and harvested for durability rather than flavor, and it is picked before full ripeness so it survives transit.
Frozen versions preserve some qualities and lose others. Frozen peas are often better than fresh out-of-season peas, while frozen leafy greens lose the texture a dry preparation depends on.
Preservation is the traditional answer
Indian kitchens historically responded to seasonality by preserving at the peak rather than by importing out of season. Pickles, sun-dried vegetables and dried lentil-vegetable preparations all come from that impulse.
Those preserves then appear on the plate during the months when fresh supply is thin, which is why a winter meal in some regions carries several preserved elements alongside the fresh ones.
The preserved item is not treated as a substitute for the fresh vegetable but as its own ingredient with its own uses, which keeps the seasonal structure of the meal intact.
American seasons do not align with Indian ones
A cook in the United States following an Indian seasonal calendar will find the produce arriving at different times, and some Indian vegetables only at Indian grocery stores when importers have them.
Matching the condition rather than the calendar is the more useful approach. A recipe calling for tender young gourds is asking for a stage of growth, and the nearest American equivalent at that stage will work better than an out-of-season import.
The rotation has practical benefits
Cooking with what is at its peak means better flavor at lower cost, since abundant produce is cheap produce. That was the original driver and it still holds in American markets.
It also spreads variety across the year automatically, which is why a household cooking seasonally ends up eating a wider range of vegetables than one buying the same list every week.