Zucchini Courgettes - Marrows that are harvested when young!
Any Marrow plant can be used as a Courgette. Bush Marrows are best for growing as Courgettes, and the F1hybrids are normally better growers and croppers.
You simply cut of the young marrows before they mature into the giants which are not often used in the kitchen.
Courgettes are Marrows!
Courgettes are best when harvested at around 5in long. Waiting for them to get to that extra inch or so, will deplete the flavour.
Courgettes are best sown indoors in peat pots - one seed to a pot - at the end of April. They will grow quickly once germinated and may get too big before you can plant them out, so end of April is early enough. You can also buy young plants from mid may at most garden centres,