Trench celery uses the method of blanching the stems with soil. This is accomplished by building up the base of the plant preventing green coloring of the stalks. This type is hardy and is harvested late fall to early spring. 'Giant Pink' - has crisp pale pink stalks that blanch easily.
'Giant Red' - has outer stalks that turn shell-pink when blanched.
'Giant White' - is old, tall, white celery with crisp stems and a solid good flavored heart.
'Hopkins Fenlander' - is late maturing celery of medium length and free from strings.
'Standard Bearer' - is red celery that has the reputation for being the latest of all to reach maturity. Self-Blanching and American Green Celery varieties:
'Celebrity' - is an early maturing variety that has crisp long stems and a nutty flavored heart. It is one of the least stringy self-blanching varieties with good bolting resistance.
'Golden Self-Blanching' - has golden-yellow hearts, and is crisp and tasty and does not become stringy.
'Greensleeves' - produces tasty green stalks.
'Ivory Tower' - has long white stringless stems.
'Lathom Self-Blanching' - is a vigorous well-flavored variety with crisp stems.
'Tall Utah Triumph' - has long succulent tender green stems. | 
