Remember when growing vegetables to also label everything: veg type; seed or plant; date into the ground; and even provisional harvesting date.
Windows of opportunity can vary dramatically depending on what you’re planning to grow. Carrots for instance can be planted outdoors anytime from February until July, then harvested between May and December.
Like carrots, beetroot can go into the ground outdoors in the UK from March until July, then come out anytime between June and October depending on when it was sown.
Tomatoes can be sown in a heated greenhouse anytime from February onwards with the first tomatoes ripening on the vine by July-August. And nothing beats a fresh tomato!