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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 <ul><li>1. Vegetable production </li></ul><ul><li>1. Brassicas for named varieties of each of cabbage (spring, summer and winter), cauliflower and kale, state: </li></ul><ul><li>1.1 state the place in seasonal rotation and successional cropping </li></ul><ul><li>1.2 state cultivation, propagation and care requirements </li></ul><ul><li>1.3 state 2 pests and 2 diseases and their control </li></ul><ul><li>1.4 state harvesting period and technique and storage </li></ul><ul><li>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 </li></ul><ul><li>2.1 state the place in seasonal rotation and successional cropping </li></ul><ul><li>2.2 state cultivation, propagation and care requirements </li></ul><ul><li>2.3 state 2 pests and 2 diseases and their control </li></ul><ul><li>2.4 state harvesting period and technique and storage </li></ul>
  • 3. Brassicas – Cabbage Varieties <ul><li>Spring: ‘Durham Early’ or ‘Pixie’ </li></ul><ul><li>Summer: ‘Greyhound’ or ‘Derby Day’ </li></ul><ul><li>Winter: Smooth – ‘Tundra’ </li></ul><ul><ul><ul><ul><li>Savoy – ‘Savoy King F1’ </li></ul></ul></ul></ul>
  • 4. Brassicas – general points <ul><li>Rotation – after legumes and before roots </li></ul><ul><li>Soil resident pests and diseases are common so rotation has real benefits </li></ul><ul><li>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. </li></ul><ul><li>Need well consolidated soil to avoid wind rock. </li></ul>
  • 5. Brassicas – more general points <ul><li>Acid soil restricts growth and encourages club root disease – soil pH needs to be 7 or above so lime in spring if necessary. </li></ul><ul><li>Sow either in modules in an unheated greenhouse or in a seed bed and transplant when four true leaves have formed. </li></ul><ul><li>Final spacings - 30cm centres for spring cabbage, 40cm for winter and summer cabbage. </li></ul>
  • 6. Brassicas – pests and diseases <ul><li>Pigeons – net crop after sowing and again after planting out. </li></ul><ul><li>Cabbage root fly – very fine netting or cabbage collars </li></ul><ul><li>Club root – no cure; grow from seed, keep soil alkaline </li></ul><ul><li>Leaf spot (ring spot) - difenoconazole (but watch the harvest interval); good crop hygiene and spacing. </li></ul>
  • 7. Salad leaves – Lettuce Varieties <ul><li>Cos – upright, loose heads e.g. ‘Little Gem’ </li></ul><ul><li>Crisphead – classic ‘iceberg’ lettuce e.g. ‘Avoncrisp’ </li></ul><ul><li>Looseleaf – cut and come again, non-hearting e.g. ‘Green Salad Bowl’ </li></ul><ul><li>Butter head – soft leaves, heart forming e.g. ‘All the Year Round’ </li></ul>
  • 8. Salad leaves etc – general points <ul><li>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. </li></ul><ul><li>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. </li></ul>
  • 9. Lettuce - sowing <ul><li>Seed is subject to heat induced dormancy so sowing in summer should be in well watered drills, on overcast days, in the evening. </li></ul><ul><li>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. </li></ul><ul><li>Rich fertile soil with a pH over 7. </li></ul>
  • 10. Salad leaves – pests and diseases <ul><li>Slugs and snails </li></ul><ul><li>Root aphid on lettuce </li></ul><ul><li>Botrytis on lettuce </li></ul><ul><li>Mosaic virus </li></ul>
  • 11. Outdoor cucumbers - varieties <ul><li>Standard ridge cucumber – ‘Marketmore’ </li></ul><ul><li>All-female ridge – ‘Paska F1’ </li></ul><ul><li>Japanese – ‘Burpless Tasty Green’ </li></ul><ul><li>Apple – ‘Crystal Apple </li></ul>
  • 12. Outdoor cucumbers <ul><li>Need very rich soil and plenty of water. </li></ul><ul><li>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. </li></ul><ul><li>Plant at at least 40cm centres and provide support for the vines to climb. </li></ul><ul><li>Feed with high potash liquid feed once the fruits start to set. Keep picking small fruit. </li></ul>
  • 13. Cucumber pests and diseases <ul><li>Slugs and snails </li></ul><ul><li>Aphid </li></ul><ul><li>Cucumber mosaic virus </li></ul><ul><li>Powdery mildew </li></ul>
  • 14. Learning outcomes <ul><li>1. Vegetable production </li></ul><ul><li>1. Brassicas for named varieties of each of cabbage (spring, summer and winter), cauliflower and kale, state: </li></ul><ul><li>1.1 state the place in seasonal rotation and successional cropping </li></ul><ul><li>1.2 state cultivation, propagation and care requirements </li></ul><ul><li>1.3 state 2 pests and 2 diseases and their control </li></ul><ul><li>1.4 state harvesting period and technique and storage </li></ul><ul><li>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 </li></ul><ul><li>2.1 state the place in seasonal rotation and successional cropping </li></ul><ul><li>2.2 state cultivation, propagation and care requirements </li></ul><ul><li>2.3 state 2 pests and 2 diseases and their control </li></ul><ul><li>2.4 state harvesting period and technique and storage </li></ul>

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