Avonresistor is a short-rooted variety of parsnip that is suitable for small gardens, as it does not grow big roots. It is a variety resistant to canker, a common disease for parsnip, and grows well in shallow, light soils. The recommended pH for soils is 6 to 7. Avonresister parsnips can be harvested from mid-autumn through the winter. USDA Hardiness Zones are 2 to 9.
Gladiator is a hybrid variety of parsnip that is fast-maturing and has a good resistance to diseases. Germination for the Gladiator parsnip variety is slow, and roots are harvested from fall onwards. After frosting, the roots have a sweet taste. This type of parsnip is easy to peel and has a white flesh. It prefers light sandy, soils; its sowing period is February to May. Gladiator parsnip requires little maintenance, but needs careful weeding.
The Cobham Improved Marrow parsnip is a variety with long roots and is resistant to canker. It grows well in light soils with a pH of about 6.5. Avoid acidic soils, as they may cause cankerous roots. The Cobham Improved Marrow has a long germination period that may last up to three weeks. It grows well in partial to full sun.
The Hollow Crown is an English variety of parsnip. Its main characteristic is a hollow crown formed in the part of the plant where the leaves attach to the root -- hence the name. This variety has white flesh and a mild flavor. The roots may grow up to a foot long, and their skin has a pale brown color. The plant prefers full sun or partial shade and it grows well in all types of soils, from sandy to fertile.