Quotes:
1. "Biennial leafy crops such as chard and flat-leaved parsley, which are usually sown in spring for autumn harvests, can be sown later in late summer for harvests in spring"
2. "Oriental salad leaves such as mibuna, mizuna, mustard, turnips and rocket germinate well in autumn and may withstand the winter with a cloche for protection and recommence growth as temperatures rise in spring"
3. "Sow spring cabbage in late summer for transplanting in autumn and harvests from mid-spring. Sow 15cm (6in) apart and thin out every other plant for spring greens in March, leaving the rest to mature"
4. "Sow corn salad and land cress in mid- to late summer; cover with a cloche in autumn for higher quality leaves"
5. "Hardy lettuces can be sown outdoors in early autumn in mild gardens and will stand the winter with protection, hearting up in mid-spring".
6. "Broad beans can be sown outdoors in late autumn in the south or indoors in February for transplanting out in early spring; with luck this may yield crops at the end of spring"
Source:
https://www.rhs.org.uk/advice/profile?PID=708
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