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RHS Year 2 week 29 presentation
 

RHS Year 2 week 29 presentation

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    RHS Year 2 week 29 presentation RHS Year 2 week 29 presentation Presentation Transcript

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