Table 5 Effect of GA₃ and melatonin on secondary head quality of two artichoke cultivars during the two growing seasons of 2017/2018 and 2018/2019

202.4 a

97.3 a

92.9 a

41.6 a

186.0 b

86.7 b

82.5 b

38.4 b

195.0 a

92.2 a

87.7ab

40.1ab

195.5 a

92.8 a

88.4 a

40.9 a

192.0 b

91.0 b

87.1 b

39.1 b

  IS

Melatonin

203.5 a

97.7 a

92.8 a

41.8 a

GA₃

203.9 a

98.3 a

93.7 a

42.1 a

Control

199.7 b

95.9 b

92.3 a

40.9 a

  R

Melatonin

186.5 c

86.7 c

82.6 b

38.3 a

GA₃

187.1 c

87.3 c

83.1 b

39.7 a

Control

184.3 c

86.1 d

81.9 b

37.2 a

199.6 a

96.6 a

91.7 a

41.2 a

184.1 b

86.8 b

80.7 b

38.2 b

192.1 a

91.9ab

86.4 a

40.0 a

193.2 a

92.3 a

86.9 a

40.4 a

190.4 b

90.9 b

85.3 b

38.9 b

  IS

Melatonin

199.6 a

96.8ab

91.9 a

41.4 a

GA₃

201.2 a

97.5 a

92.4 a

41.9 a

Control

198.0 a

95.4 b

90.7 a

40.5 a

  R

Melatonin

184.5 b

87.0 c

80.8 b

38.5 a

GA₃

185.2 b

87.1 c

81.4 b

38.8 a

Control

182.7 b

86.3 c

79.8 b

37.3 a