Spinach, peas, cilantro, parsley, and root veggies like beets and radish are great plants to grow on cooler days.

It’s when eager gardeners get busy starting their cool-season plants, such as cabbage, broccoli, cauliflower ... another class of plants indoors from seeds – perennial flowers.

Once the seeds have germinated, thin the seedlings to 7.5cm (3in) between each plant. Cabbage and broccoli seedlings are ready for transplanting when they're between 6 and 8cm high (2.5-3in).