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The study was carried out to investigate the effect of foliar application of chitosan with 1, 2 and 3 g l -1 concentrations applied at different time (once, twice and three times) on vegetative growth and yield attributing traits of strawberry (var. winter dawn) during 2019-20. Results revealed that all tested foliar concentration of chitosan increased vegetative growth characteristics viz., (plant height 23-28 cm, number of trifoliate leaves/ plants 22-28, leaf area 92-105.65 cm 2 and plant dry weight 23-33 g) and yield attributes (berry length 3.41-3.96 cm, berry diameter 2.82-3.15 cm, berry weight 16.93-18.55 g and number of berries/ plant16.6-19.74) compared to water spray. Among the chitosan treatment, application of chitosan at 3 g l -1 on 45, 90 and 135 days interval recorded maximum yield (366 g plant -1 ) followed by chitosan at 3 g l -1 on 45 and 90 (346 g plant g plant -1 ) and chitosan at 2 g l -1 on 45 and 90 days (343 g plant -1 ) interval due to higher growth and yield attributing traits. There was no significant effect for the tested treatments on runner production.

This study evaluated the development of above ground plant parts of strawberry cv. 'Winter dawn', in naturally ventilated polyhouse with seven media combinations using six pot culture media viz., soil, sand, farmyard manure, cocopeat, vermicompost and vermiculite under vertical faring system. The study revealed that maximum plant height (29.13 cm), number of trifoliate leaves per plant (27.80), plant spread in North-South and East-West direction (31.27 cm and 30.21 cm, respectively), leaf area (108.26 cm 2 ), number of crowns per plant (4.56), number of runners per plant (6.13), plant dry weight (38.50 g) at harvest, yield per plant (391.24 g), yield over control (61.12%), net income (1,22,183 ₹/ 1032 m 2 ) and benefit to cost ratio (2.04) was observed in treatment T4 containing Soil + cocopeat + vermiculite + vermicompost in 1:1:1:1 ratio on volume basis followed by the treatment T6 containing cocopeat + vermiculite + vermicompost in the ratio of 1:1:1.