The end of March is the perfect time to start sowing your Sweet Peas. You can start them off in late autumn but if you start them now you will lose less germinating plants because of exceptionally cold weather or pests.
Sow the seeds about ½ inch deep in a large tray filled loosely with seed compost. Don’t be tempted to push the seeds down. Then make sure they are watered regularly. If you place them on a heated sill or green house bench they will germinate in around 12 days. When the first two pairs of leaves show, pinch out the upper tips to encourage strong root growth. You can plant them out in late April or May depending on the weather.