Seed sowing (indoors)
I advise against sowing seeds outdoors until September, when it is warmer. I usually start sowing seeds indoors on my heat pad in August, but one exception is begonia semperflorens (waxy bedding begonias). As they take a very long time to germinate and grow, begonia seeds can be sown undercover as early as May right through until September, according to the Egmont Seeds Commercial Catalogue. That way, your heat pad(s) will be free by the time you want to start your seed sowing in late winter/early spring.
Here are some pictures of bedding begonias that I raised from seed last season.
You can plant the following outside:
You can place orders for the following now:
Here is a list of tasks you can do indoors, which is perfect for when it’s raining.