TIPS FOR NEW SEEDING SPROUTING TIMES FOR LAWN GRASSES UNDER OPEN-AIR CONDITIONS The seed quantity is 25,000-50,000 grains per m2 of seeding area. An even mix should be ensured when sowing. The seed must not be worked deeper than 0.5 to 1 cm into the soil and is then rolled. Harrow with screen roller for prepared the seed bed. Preparing the ground Grain size threshold for turf-bearing layer material. Siftings as mass percentage in % Grain diameter d in mm The lawn should be watered several times during the day for around 5-10 mins so that the upper layer of soil doesn’t dry out. Sowing Sowing should be done in the months of April to mid-September, which enjoy a lot of light and precipitation. The ideal germination temperature for lawn grasses is between 16 °C and 21 °C, but they need at least 8 °C. Exceptions are ryegrass (Lolium) and timothy (Phleum). These germinate even with soil temperatures below 8 °C, which has to be taken into account when sowing early or late. Dryness will delay the sprouting of the seed, so watering regular is advised. Once the ground has been watered after sowing, it has to be kept permanently moist for the following 2-3 weeks to avoid the young seedlings drying out. The young grass sprouts can be mowed for the first time once they reach a height of around 50-70 mm In the case of the slower development of the grass plants, e.g. mixtures without ryegrass, a “cleaning” cut may be necessary to remove fast-germinating and tall-growing weeds and ensure that the young seeds are not smothered. SERVICE Type Average sprouting time in days Lolium perenne 7–15 Phleum pratense 7–16 Phleum bertolonii 8–17 Cynosurus cristatus 9–18 Festuca rubra 10–18 Festuca ovina 11–19 Agrostis spec. 12–20 Poa pratensis 14–24 Festuca arundinacea 10–18 62
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