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RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
RHS Level 2 Certificate Year 1 Session 21
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RHS Level 2 Certificate Year 1 Session 21

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  • 1. RHS Level 2 Certificate Week 21 – Outdoor food production. Vegetables – Brassicas and salad vegetables
  • 2. Learning outcomes
    • 1. Vegetable production
    • 1. Brassicas for named varieties of each of cabbage (spring, summer and winter), cauliflower and kale, state:
    • 1.1 state the place in seasonal rotation and successional cropping
    • 1.2 state cultivation, propagation and care requirements
    • 1.3 state 2 pests and 2 diseases and their control
    • 1.4 state harvesting period and technique and storage
    • 2. Salad veg and misc. leaves for named varieties of each of lettuce (crisphead, butterhead, Cos and cut and come again), outdoor cucumber, endive and Chinese leaves (Pak Choi, Mizuna,), state
    • 2.1 state the place in seasonal rotation and successional cropping
    • 2.2 state cultivation, propagation and care requirements
    • 2.3 state 2 pests and 2 diseases and their control
    • 2.4 state harvesting period and technique and storage
  • 3. Brassicas – Cabbage Varieties
    • Spring: ‘Durham Early’ or ‘Pixie’
    • Summer: ‘Greyhound’ or ‘Derby Day’
    • Winter: Smooth – ‘Tundra’
          • Savoy – ‘Savoy King F1’
  • 4. Brassicas – general points
    • Rotation – after legumes and before roots
    • Soil resident pests and diseases are common so rotation has real benefits
    • Very heavy feeders – need lots of nitrogen. Legumes provide some; manuring in Autumn and applying base dressing before sowing and then feeding during the season provides the balance.
    • Need well consolidated soil to avoid wind rock.
  • 5. Brassicas – more general points
    • Acid soil restricts growth and encourages club root disease – soil pH needs to be 7 or above so lime in spring if necessary.
    • Sow either in modules in an unheated greenhouse or in a seed bed and transplant when four true leaves have formed.
    • Final spacings - 30cm centres for spring cabbage, 40cm for winter and summer cabbage.
  • 6. Brassicas – pests and diseases
    • Pigeons – net crop after sowing and again after planting out.
    • Cabbage root fly – very fine netting or cabbage collars
    • Club root – no cure; grow from seed, keep soil alkaline
    • Leaf spot (ring spot) - difenoconazole (but watch the harvest interval); good crop hygiene and spacing.
  • 7. Salad leaves – Lettuce Varieties
    • Cos – upright, loose heads e.g. ‘Little Gem’
    • Crisphead – classic ‘iceberg’ lettuce e.g. ‘Avoncrisp’
    • Looseleaf – cut and come again, non-hearting e.g. ‘Green Salad Bowl’
    • Butter head – soft leaves, heart forming e.g. ‘All the Year Round’
  • 8. Salad leaves etc – general points
    • Lettuce and cucumber are not in any rotation group. Many oriental salad leaves are brassicas- for example Pak Choi and Mizuna - and these should be rotated with the brassicas.
    • All salad vegetables require fertile soil and plenty of water. Watering needs to be consistently plentiful throughout the season if there is no regular rain fall.
  • 9. Lettuce - sowing
    • Seed is subject to heat induced dormancy so sowing in summer should be in well watered drills, on overcast days, in the evening.
    • When mature, hearting lettuces bolt – so, sow a few seeds every two weeks to avoid a glut. Loose leaf lettuce are less prone to bolting, sow every three weeks.
    • Rich fertile soil with a pH over 7.
  • 10. Salad leaves – pests and diseases
    • Slugs and snails
    • Root aphid on lettuce
    • Botrytis on lettuce
    • Mosaic virus
  • 11. Outdoor cucumbers - varieties
    • Standard ridge cucumber – ‘Marketmore’
    • All-female ridge – ‘Paska F1’
    • Japanese – ‘Burpless Tasty Green’
    • Apple – ‘Crystal Apple
  • 12. Outdoor cucumbers
    • Need very rich soil and plenty of water.
    • Need warmth to germinate and to grow successfully. Sow in May/June or if earlier then under glass with bottom heat. Plant in a sunny sheltered place.
    • Plant at at least 40cm centres and provide support for the vines to climb.
    • Feed with high potash liquid feed once the fruits start to set. Keep picking small fruit.
  • 13. Cucumber pests and diseases
    • Slugs and snails
    • Aphid
    • Cucumber mosaic virus
    • Powdery mildew
  • 14. Learning outcomes
    • 1. Vegetable production
    • 1. Brassicas for named varieties of each of cabbage (spring, summer and winter), cauliflower and kale, state:
    • 1.1 state the place in seasonal rotation and successional cropping
    • 1.2 state cultivation, propagation and care requirements
    • 1.3 state 2 pests and 2 diseases and their control
    • 1.4 state harvesting period and technique and storage
    • 2. Salad veg and misc. leaves for named varieties of each of lettuce (crisphead, butterhead, Cos and cut and come again), outdoor cucumber, endive and Chinese leaves (Pak Choi, Mizuna,), state
    • 2.1 state the place in seasonal rotation and successional cropping
    • 2.2 state cultivation, propagation and care requirements
    • 2.3 state 2 pests and 2 diseases and their control
    • 2.4 state harvesting period and technique and storage

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