When May arrives, you need to get rid of it.
Who does not prune until March vintage in the lap
At S. Matias, exertias begin
August, thresh; September, harvest.
Short pruning: long harvest.
Vine that burst in April gives little wine to the barrel.
António Cabral https://www.antoniocabral.com.pt/proverbios-da-vinha-e-do-vinho/