Matthew Poole and continuators on Genesis 30:14

14 And Reuben went in the days of wheat harvest, and found Mandrakes in the field, and brought them unto his mother Leah. Then Rachel said to Leah, Give me I pray thee of thy sons Mandrakes ▪

The word is onely found here and Cant. 7. 13. whence it appears that it is a Plant or Fruit of pleasant smell, such as the Mandrake is said to be by Dioscorides and Levinus Lemnius, and by St. Austin upon his own experience. If it be said, this was too early for Mandrakes to be ripe, it being now but wheat harvest, it may be replyed, that fruits ripen much sooner in those hot Countries, than elsewhere, and that they are not here said to be ripe, but onely to be gathered.

Which she might desire either because they were pleasant to the eye or tast, or because they were thought helpful to conception.