Choose which veg to grow by working out how long their growing season is and either pairing them with a crop to follow, or ensuring there is enough room to sow another round the following week or two after.
For some crops, such as rocket, spinach, and broccoli, successional sowing increases success because they are prone to bolting. On the other hand, growing rounds of long-fruiting crops means there will be ample supply of quality veg well into autumn. This is beneficial for courgettes and cucumbers.
Some crops that have short growing seasons include beetroot, turnips, spring onions, kale, and Swiss chard to name a few. Therefore, these can be sown regularly for a continuous supply, especially when opting for cultivars that are fast to mature.