Hollyhock - Alcea rosea
Hollyhocks like rich, free draining soil in a sunny position. They are perennials, but are usually grown as biennials.
They can suffer from rust, there's not too much that you do about this, apart from remove the plant after flowering. However, companion planting with Achilla millefolium (common yarrow), the leaves and roots are rich in copper which is a natural fungicide, which may help.
They will self-set freely or pick off the seed heads and sow the seeds as soon as the are ripe in pots or open ground in autumn, they will flower the following year.
Suggested sowing time:
(Key: 
sow indoors,
sow outside,
sow outside under cover.)
Cultivars and varieties:
Alcea rosea 'Chater's Double' - This short lived perennial has a frilly, double flowers. It is named after the nurseryman W. Chater who grew hollyhocks in his garden in the 1840-50's.
Alcea rosea 'Chater's Salmon Pink'
Alcea rosea 'Chater's Scarlet'
Alcea rosea 'Chater's Yellow'
Alcea rosea 'Nigra' - Has a deep red/maroon flower.
Seeds to sow now:
Indoors or in a heated greenhouse
Coriander
Cress
Forget-me-not
Ornamental pepper
Outside
Alpine wallflower
Aubretia, Rock cress, Aubrieta, Aubrietia
Basil
Beet, Beetroot, Chard
Beetroot
Cabbage
Canterbury bell,
Cardoon
Carrot
Common wallflower
Cress
Double daisy
Foxglove
French bean, Fine bean
Kohl rabi
Marrow
Ornamental winter kale
Pansy
Radish
Spinach
Spring onion
Sweet William
Turnip
Outside under cover
