Best flowering pelargoniums for Spring include:
P. denticulatum a large slightly bushy shrub full of pastel pink flowers during Spring which looks stunning when lit up by the sun and also attracts honey bees, excellent for a border plant.
Pelargonium graveolens which grows well in medium to large pots and is an attractive plant with rose/mint scented leaves and pretty pink flowers and a lovely plant to grow near the house in a sunny area.
Other spring flower pelargoniums include P. quercifolium- grows well with other shrubs like rosemary.
P. visscossimum, P. odoratissmum. P. vitifolium, P. grossularioides, P. tongaense, P. elongatum and P. greytonense.