Sweet peas can be germinate in Autumn but they will need to be kept overwinter in a frost free greenhouse/cold frame. Sowing in the Autumn can produce sturdier plants for the spring, which gives a head start when planting out and they will flower earlier. Germinate seeds in warm place into root trainers. Although sweet peas can be grown in cardboard tubes these are not ideal for overwintering, root trainers are better for the Autumn sown sweet peas.
Sow one or two seeds to each pot and when they have germinated and started growing, harden off on milder days outside gradually getting the plants acclimatised to the colder weather and bring in under glass before it gets really cold. Alternatively you can start and grow them on in the greenhouse under glass. The sweet peas will be fine in a greenhouse all winter and will need to be pinched out at the top growing points 2 or 3 times depending on the rate of growth. This will make the plants bush and produce more stems and in the spring, more flowers.
If you look at the image you can see clearly where the growth points have been nipped out. Sweet Peas are a fabulous summer annual, for tips and advise on how to germinate, plant and grow sweet peas visit the sweet pea pages.
Autumn is the traditional time for planting spring bulbs. Daffodils need to go in first in September and October; Tulips later in November. The correct planting depth is very important to ensure flowering, too shallow and they not flower after year one. An easy rule of thumb is plant the bulb 3 times its own depth and if hesitating plant deeper rather than shallow. Snowdrops are the first bulbs to appear and look great in a naturalised setting.
If you are looking for inspiration and ideas for spring bulbs check out the Spring bulbs on Pinterest and for more information and planting advice about planting spring bulbs