RHS Year 2 week 29 presentation

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RHS Year 2 week 29 presentation

  1. 1. RHS Level 2 Certificate Year 2 Week 29 – Introduction to Lawns and Creating a new Lawn
  2. 2. Quiz <ul><li>11 questions – 20 minutes </li></ul><ul><li>Test conditions please </li></ul><ul><li>Write your names on the top of the page and hand in for marking. </li></ul>
  3. 3. Learning Objectives <ul><li>6. Understand the establishment and maintenance of lawns. </li></ul><ul><li>6.1 State appropriate grass mixtures for the establishment of a high quality ornamental lawn and for a hard-wearing utility lawn. </li></ul><ul><li>6.2 State the benefits and limitations of establishing lawns from seed. </li></ul><ul><li>6.3 Describe the procedure for establishing a lawn from seed. </li></ul><ul><li>6.4 State the benefits and limitations of establishing a lawn from turf. </li></ul><ul><li>6.5 Describe the procedure for establishing a lawn from turf. </li></ul>
  4. 4. Grass - structure
  5. 5. Lawn Grass – physiology and structure <ul><li>Meristem at the base not tip or sides of shoots. Damage to leaves encourages growth </li></ul><ul><li>Vegetative reproduction by tillers, stolons and rhizomes (depending on species) </li></ul><ul><li>Shallow roots – make best use of traces of moisture </li></ul><ul><li>Survive drought by becoming dormant </li></ul><ul><li>Narrow leaves </li></ul><ul><li>Seed needs light to germinate. </li></ul>
  6. 6. Lawn Grass - uses <ul><li>Luxury – fine, close cut, tufted appearance. Not suitable for heavy use; requires frequent mowing. </li></ul><ul><li>Utility – longer, coarser appearance. Less tolerant of close mowing (no stripes!) but much more tolerant of heavy use. </li></ul>
  7. 7. Species and combinations <ul><li>The combinations of species give the characteristics of the final product. </li></ul><ul><li>Luxury mix – Agrostis tenuis (20%) and Festuca rubra commutata (80%). Close cut fine appearance, drought resistant but not hard wearing or shade tolerant. </li></ul><ul><li>Utility mix - Agrostis tenuis (10%), Festuca rubra rubra (20%), Poa pratensis (30%) and Lolium perenne (40%). Longer cut, hard wearing, more shade tolerant. </li></ul>
  8. 8. Seed or turf? <ul><li>Seed - advantages: cheap and quick to sow. Better variety of mixes available. </li></ul><ul><li>Seed – disadvantages: needs better ground preparation and much more aftercare. Can only sow April or September </li></ul><ul><li>Turf – advantages: instant effect; longer season for laying turf; less care needed with soil preparation. Can lay between September and March. </li></ul><ul><li>Turf – disadvantages: much more expensive (factor of 10); more expertise needed to lay. </li></ul>
  9. 9. Soil preferences <ul><li>Good drainage </li></ul><ul><li>pH 5.5 – 7 – fine leaved grasses such as Agrostis tenuis and Festuca sp. do better at the acid end of this range. </li></ul><ul><li>Fine tilth allows good root penetration. </li></ul><ul><li>Needs a reasonable depth of top soil 15 to 20cm ideally. </li></ul><ul><li>Prefers loam. </li></ul>
  10. 10. Soil preparation –both seed and turf <ul><li>Kill and strip off old turf </li></ul><ul><li>Good initial cultivation is vital – double dig or rotavate. </li></ul><ul><li>Rake to a fine level tilth; no lumps and bumps. </li></ul><ul><li>Incorporate high phosphate fertilizer at recommended dosage </li></ul><ul><li>Tread to firm and then rake out footprints </li></ul><ul><li>‘ Stale seed bed’ </li></ul><ul><li>Spray off weeds that have germinated </li></ul>
  11. 11. Sowing lawn seed <ul><li>Key factors – good contact with soil; even seed distribution; constant moisture. </li></ul><ul><li>Good contact – provided by fine tilth and firm seed bed. Firm in after gently raking in. </li></ul><ul><li>Even seed distribution –calculate the area, weigh the seed and sow either with a calibrated broadcast sower or in measured meter squares by hand. </li></ul><ul><li>Moisture – water with a hose with a fine spray every day for first two weeks, then reducing frequency. Will need watering for first 6 months if dry. </li></ul>
  12. 12. Laying turf <ul><li>Turf should be moist and green – yellow dry turf is dead and will not recover. </li></ul><ul><li>Lay turf offset – like a brick wall and butted very close, no visible joins. Work from a plank. </li></ul><ul><li>Trim roughly round curves etc. finish with a half moon once the turf is rooted. </li></ul><ul><li>Water thoroughly once laid and then every other day in dry weather until well rooted. </li></ul><ul><li>Useable once the turf has rooted. </li></ul>
  13. 13. Lawn Advice Answers <ul><li>1. Luxury lawn seed – Agrostis tenuis (20%) and Festuca rubra commutata (80%). </li></ul><ul><li>Turf </li></ul><ul><li>Full sun, good drainage, pH 5.5 – 7 </li></ul><ul><li>Good root development </li></ul><ul><li>Good contact between seed and soil; even seed distribution; constant moisture </li></ul><ul><li>Even seed distribution </li></ul>
  14. 14. Learning outcomes <ul><li>6. Understand the establishment and maintenance of lawns. </li></ul><ul><li>6.1 State appropriate grass mixtures for the establishment of a high quality ornamental lawn and for a hard-wearing utility lawn. </li></ul><ul><li>6.2 State the benefits and limitations of establishing lawns from seed. </li></ul><ul><li>6.3 Describe the procedure for establishing a lawn from seed. </li></ul><ul><li>6.4 State the benefits and limitations of establishing a lawn from turf. </li></ul><ul><li>6.5 Describe the procedure for establishing a lawn from turf. </li></ul>

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