Crop

Disease

Rotation Recommendation

Asparagus

Fusarium Wilt, Root & Crown Rot

Indefinite; use transplants grown from treated seed, plant on clean ground in raised beds; rotate with grasses and cereals

Basil

Fusarium Wilt

Indefinite; plant disease-free seed in disease-free soil or potting mix

Bean, Dry

White Mold (Sclerotinia Rot)

8-9 years of non-host crops

Bean, Green

Fusarium Root Rot

5-6 years, rotate with grass or small grain crops

Gray Mold

2 years, rotate with cereals and corn

White Mold (Sclerotinia Disease)

2-3 years; avoid tomato, potato, lettuce, cabbage, celery, carrot, peas

Bacterial blight

2 years; eliminate overhead irrigation

Beet, Red

Cercospora Leaf Spot

3 years

Root rots

3 years; rotate with grain crops and sweet corn

Cabbage and

Blackleg

5 years; no adjacent crucifer crops for this time period

Cauliflower

Black Rot

2-3 years, no crucifer crops

Club Root

6+ years; no crucifer crops; adjust pH to 6.8 or above

Damping-off and Wirestem

3 years, rotate with cereals

Leaf Spot

3 years

Phytophthora Root Rot

3 years, rotate with nonsusceptible crops such as grass or grains

Water Soft Rot (White Blight)

3 years, rotate with nonsusceptible crops such as grass or grains

White mold, Scelerotinia

3 years, rotate with grains and sweet corn

Cabbage

Nematode (Sugar Beet Cyst)

2 years for slight infestations, 5-6 years for severe infestations; avoid crucifers. Rotate with beans, clover, corn, grains, peas, potatoes, and tomatoes annually. Alfalfa is suitable for a long rotation period.

Cantaloupe

Fusarium Wilt

4+ years; no cucurbit crops; avoid soil with a history of this disease

Leaf Blight

2+ years; do not plant other cucurbits

Leaf Spot, Gummy Stem Blight, & Scab

2+ years; do not plant other cucurbits

Carrot

Alternaria Leaf Spot & Leaf Blight

1-2 years

Bacterial Leaf Blight

2-3 years

Black Rot

1-2 years

Cavity Spot

6-7 years; avoid fields with a recent history of cavity spot

Cercospora Leaf Spot, Leaf Blight

1-2 years

Cottony Soft Rot (White Mold)

2 years; rotate onions, grasses, cereals; do not rotate with beans, lettuce, parsnips, crucifers; do not grow early or late crops in fields with a history of this disease as heavy rains can cause severe losses

Nematode (Root-knot)

4-5 years; rotate with a nonhost crop such as corn or cereals

Violet Root Rot

4-5 years, rotate with cereals and grasses

Celery

Fusarium Yellows

2-3 years, rotate with corn, crucifers, cucurbits, or onions

Late Blight

2 years

Leaf Blights

2 years

Sclerotinia Pink Rot

2-3 years, rotate with corn, cereals, beets, onions, and spinach

Corn

Leaf Spots and Blights

2-3 years

Seed Rot and Seedling Blight

2-3 years

Smut (Head)

3-4 years

Stalk Rots

2-3 years

Cucumber

Alternaria Leaf Spot

2 years

Powdery Mildew

2-year, plant no cucurbits during this time

Scab (Gummosis)

2-3 years, plant no cucurbit crops during this time

Sclerotinia Stem Rot (White Mold)

2-3 years, do not follow potato or tomato crops

Eggplant

Anthracnose

Rotate crops

Cercospora Leaf Spot

Rotate crops

Root Rot

Practice light irrigation and crop rotation

Verticillium Wilt

4-5 years, rotate with grasses and grains, no solanaceous crops, strawberry or brambles

Garlic

Leaf Blight

2-3 years

Nematode (Stem & Bulb)

2 years

White Rot

6-7 years; plant only disease-free cloves in disease-free soil

Ginseng

Verticillium Wilt

3-4 years; rotate with alfalfa or cereal crops

Lettuce

Anthracnose

4-5 years

Bottom Rot

3 years, rotate with sweet corn or onions

Drop (Watery Soft Rot)

3 years; rotate with corn, cereals, grasses, onions, table beets, spinach; avoid tomato, potato, beans, cabbage, celery, carrots

Lettuce

Varnish Spot

2-3 years

Onion

Basal Plate Rot

4 years

Botrytis Leaf Blight

2-3 years, no allium crops

Downy Mildew

3-4 years

Nematode (Stubby-root)

5-6 years, do not plant after a mint crop

Pink Root

3-6 years

Purple Blotch

5-6 years, no allium crops

White Rot

6-7 years, plant only disease-free material in disease-free soil

Parsley

Damping-off

3 years

Parsnip

Leaf spot and root canker

2 years

Pea

Aphanomyces Root Rot

4-5 years

Ascochyta Blight (Basal Stem Rot or Black Stem)

4 years; do not include vetch or alfalfa in the rotation

Downy Mildew

2-3 years, do not rotate with legumes

Nematode (Pea Cyst)

4 years for slight infestation, eliminate peas if high infestation

Powdery Mildew

1 year

Root Rots

5 years

Seed Rot and Damping-off

3 years

Wilt and Near-wilt

5 years

Pepper

Anthracnose

3 years

Cercospora Leaf Spot

3-4 years

Phytophthora blight

3 years; avoid tomato, eggplant, cucurbits

Root Rot

3-4 years

Verticillium Wilt

3 years, rotate with grass and grain crops

Potato

Black Dot

2-3 years

Early Blight

2 years; do not plant tomatoes

Fusarium Wilt

4-5 years

Nematode (Potato Rot)

2-3 years, rotate with cereals and corn

Nematode (Root-knot)

2-3 years, rotate with cereals or sweet corn

Nematode (Root-lesion)

2-3 years, rotate with cereals or sweet corn

Powder Scab

3-4 years; avoid planting on previously contaminated ground

Pythium leak, pink rot

4 years

Rhizoctonia Canker (Black Scurf)

3 years; best with cereals or grass

Scab

2-3 years; no root crops; adjust pH to 5.2 or below

Sclerotinia stalk rot

4 years, avoid tomato, lettuce, beans, cabbage, celery, carrot, beans

Silver Scurf

3 years

Verticillium Wilt (Potato Early Dying)

3-4 years, do not solanaceous, cucurbits, mint or nursery maple crops; rotate with alfalfa or cereals

Radish

Black Root

3-4 years

Clubroot

7 years; do not plant crucifers; adjust pH to 6.8

Spinach

Downy mildew & White Rust

2-3 years

Tomato

Anthracnose

1-2 years; alternate every other year with nonsolanaceous crop

Bacterial Canker

3-4 years

Bacterial Spot

2 years; do not plant peppers

Early Blight

3-4 years

Wilt

4-6 years

Turnip and

Black Root Rot

3 years, do not plant any crucifers during this period

Rutabaga

Club Root

6-7 years; do not plant crucifers; adjust pH to 6.8

Powdery Mildew

1 year

Winter

Alternaria Leaf Blight

2-3 years, do not plant any cucurbits during this period

Squash &

Angular Leaf Spot

2 years

Pumpkins

Crown and Foot Rot (Fusarium Root Rot)

3-5 years, plant no cucurbits

Gummy Stem Blight (Black Rot)

2-3 years, plant no cucurbits

Phytophthora blight

3 years; do not plant tomato, pepper, eggplant, or cucurbits

Pythium Root Rot

2 years

Scab (Gummosis)

2-3 years, plant no cucurbits

Sclerotinia Stem Rot

2-3 years, do not plant potatoes