Sprouts are smaller than peas but plants are 3’ and full of green bushy leaves.
This article explains how to trim brussels sprouts for bigger and more sprouts:
https://www.gardeningknowhow.com/edible/vegetables/brussels-sprouts/pruning-brussels-sprouts.htm
In the south east of the UK
These articles should help:
https://www.gardeningknowhow.com/edible/vegetables/brussels-sprouts/how-to-grow-brussel-sprouts.htm
https://www.gardeningknowhow.com/edible/vegetables/brussels-sprouts