How to Prune endive 'Wallone'?
No pruning required

endive 'Wallone' · Cichorium endivia 'Wallone'
Grow in fertile soil in partial shade in cool conditions. Sow seed in June/July for an Autumn harvest. May bolt if sown too early in Spring. See RHS GYO advice profile on Endive for further information
No pruning required