The Gospels of Matthew and Mark describe a miracle in which Jesus curses a fig tree that was producing no fruit. When Jesus' disciples saw the same fig tree the next morning, they noticed that it had already withered. As explained in the Gospel of Mark:
12 The next day, when they had come out from Bethany, he was hungry. 13 Seeing a fig tree afar off having leaves, he came to see if perhaps he might find anything on it. When he came to it, he found nothing but leaves, for it was not the season for figs. 14 Jesus told it, “May no one ever eat fruit from you again!” and his disciples heard it.
. . .
20 As they passed by in the morning, they saw the fig tree withered away from the roots. 21 Peter, remembering, said to him, “Rabbi, look! The fig tree which you cursed has withered away.”
22 Jesus answered them, “Have faith in God. 23 For most certainly I tell you, whoever may tell this mountain, ‘Be taken up and cast into the sea,’ and doesn’t doubt in his heart, but believes that what he says is happening, he shall have whatever he says. 24 Therefore I tell you, all things whatever you pray and ask for, believe that you have received them, and you shall have them. 25 Whenever you stand praying, forgive, if you have anything against anyone; so that your Father, who is in heaven, may also forgive you your transgressions. (Mark 11:12-14; 20-25, WEB)
To paraphrase the commentary of John Gill and other Bible scholars on Matthew 21:18-22 and Mark 11:12-14, 20-25, there could have been a reasonable expectation to find fruit on that particular fig tree because it was sprouting leaves to an extent that it was noticeable from a distance, regardless of whether it was yet harvesting time for figs. Gill was an English Baptist minister who wrote commentaries about the Bible during the 1700s.
Read more in the book Jesus the Miracle Worker: The 50 miracles of Jesus explained in chronological order (The Jesus Series) -- now available at amazon.