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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 RHS Level 2 Certificate Year 1 Session 21 Presentation Transcript

    • RHS Level 2 Certificate Week 21 – Outdoor food production. Vegetables – Brassicas and salad vegetables
    • 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
    • Brassicas – Cabbage Varieties
      • Spring: ‘Durham Early’ or ‘Pixie’
      • Summer: ‘Greyhound’ or ‘Derby Day’
      • Winter: Smooth – ‘Tundra’
            • Savoy – ‘Savoy King F1’
    • 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.
    • 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.
    • 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.
    • 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’
    • 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.
    • 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.
    • Salad leaves – pests and diseases
      • Slugs and snails
      • Root aphid on lettuce
      • Botrytis on lettuce
      • Mosaic virus
    • Outdoor cucumbers - varieties
      • Standard ridge cucumber – ‘Marketmore’
      • All-female ridge – ‘Paska F1’
      • Japanese – ‘Burpless Tasty Green’
      • Apple – ‘Crystal Apple
    • 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.
    • Cucumber pests and diseases
      • Slugs and snails
      • Aphid
      • Cucumber mosaic virus
      • Powdery mildew
    • 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