Zone 6

USDA Hardiness Zone 6 encompasses regions with average minimum winter temperatures ranging from -10°F to 0°F (-23°C to -18°C). This zone covers parts of the central and eastern United States, including areas like St. Louis, Missouri, and parts of Kansas and New Jersey. Gardeners in Zone 6 benefit from a relatively long growing season, typically lasting from late April to late October. This climate allows for a diverse range of plants, including many perennials, shrubs, and trees. Successful gardening in Zone 6 involves selecting plants that can thrive in moderate cold and taking advantage of the extended growing period to maximize plant productivity.

What is the climate like in Zone 6?

Zone 6 experiences average minimum winter temperatures between -10°F and 0°F (-23°C to -18°C). While less severe than colder zones, these temperatures can still damage plants that are not sufficiently hardy. Selecting plants that can tolerate these moderate cold conditions is essential​.

Frost dates in Zone 6 can vary, with the last frost typically occurring in late April and the first frost appearing in late October. This provides a relatively long growing season, but gardeners must still be mindful of these frost dates to protect sensitive plants during early spring and late fall​.

Zone 6 regions can experience variable precipitation, including both wet and dry spells. Managing water effectively is crucial to ensure plants receive adequate moisture without becoming waterlogged. Implementing good drainage systems and using mulch can help maintain soil moisture levels​.

Soil types in Zone 6 can vary widely, from sandy soils to clay. Proper soil preparation, including the addition of organic matter, can improve soil structure, fertility, and drainage. Regular soil testing and amendments are recommended to maintain optimal growing conditions.

Warmer temperatures and extended growing seasons in Zone 6 can lead to increased pest and disease pressures. Integrated pest management (IPM) practices, such as crop rotation, proper spacing, and the use of resistant plant varieties, can help mitigate these issues​.

What is the recommended planting schedule?

Below, you can see the recommended planting schedule for vegetables and herbs.

Vegetables

PlantSow seeds indoorTransplanting to outdoorHarvesting MonthLast date
PeaApril 28May 4July 27July 13
ArugulaApril 27May 4May 17September 22
CucumberN/AN/AN/AN/A
Brussels SproutsMay 7May 14August 2July 7
TomatoJune 10June 15August 9July 11
SpinachApril 7April 17May 22September 19
BeetsMay 2ndMay 12thJuly 1stAugust 16th
ZucchiniN/AN/AN/AN/A
CabbagesN/AN/AN/AN/A
PotatoMay 2May 12July 11August 6
RadishApril 29May 4June 1September 7
BroccoliMay 2May 12July 6August 17
CarrotMarch 20April 3June 26August 10
CauliflowerApril 22April 29June 18August 22
OnionMarch 25April 3August 1July 5

Herbs

PlantSow seeds indoorTransplanting to outdoorHarvesting MonthLast date
Lemon balmMay 22June 1July 21July 25
MarjoramMay 25June 1July 6August 9
ParsleyMarch 14April 3May 23September 11
DillJuly 3July 13August 10July 14
FennelApril 7April 21July 6August 18
SageMay 22June 1July 31July 15
ThymeDecember 28January 17March 17November 1
OreganoApril 27May 4June 18August 21
MustardApril 27May 4June 3September 5
MintJune 16June 26August 25June 27
LavenderApril 24May 8June 17August 26
RosemaryApril 2April 17July 6August 5
GingerN/AN/AN/AN/A
BasilMay 25June 4July 24July 13
CilantroMay 2May 9August 30June 13