Zone 2

Zone 2 of the USDA Hardiness Zones encompasses regions with extremely cold climates, characterized by average minimum winter temperatures ranging from -50°F to -40°F. This zone includes parts of interior Alaska and northern Canada, where the harsh conditions require plants to have exceptional cold tolerance. Gardeners in Zone 2 often focus on hardy perennials, shrubs, and trees that can withstand prolonged freezing temperatures and short growing seasons. Examples of such plants include certain varieties of spruce, pine, and juniper. Understanding the limitations and opportunities of Zone 2 is essential for successful gardening in these frigid environments​

What is the climate like in Zone 2?

Gardening in USDA Hardiness Zone 2 presents unique challenges due to its extreme climate conditions. Understanding these challenges is essential for successful gardening and plant survival. Here are the key climate challenges faced in Zone 2:

Zone 2 is characterized by average minimum winter temperatures ranging from -50°F to -40°F (-45°C to -40°C). These frigid temperatures can cause severe damage to plants that are not adequately cold-hardy. Plants must be able to withstand prolonged periods of deep freezing to survive in this zone​.

The growing season in Zone 2 is notably brief, typically lasting only about 90 to 110 days. This short window requires gardeners to be strategic in their planting schedules, ensuring that crops and plants have enough time to mature before the onset of the next winter​.

Frost can occur late in Spring and even Summer (June 1 – June 15) and early in Summer (August 1 – August 15), further shortening the effective growing season. Additionally, heavy snow coverage is common, which can insulate plants but also delay spring planting. The presence of snow can be both a benefit and a challenge; while it protects soil and plant roots from extreme cold, it also means that the soil remains frozen for longer periods, delaying planting times​.

During the winter months, Zone 2 regions experience very short daylight hours and low levels of sunlight, impacting plant growth and development. Gardeners often need to choose plants that can thrive in these low-light conditions or use artificial lighting to supplement natural sunlight during the growing season​.

Soils in Zone 2 can be challenging due to the freeze-thaw cycles, which can cause soil heaving and damage plant roots. Ensuring proper drainage and soil amendments to improve soil structure and fertility is crucial. Additionally, water management is vital as the ground may remain frozen for extended periods, limiting water availability to plants during early spring​.

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 18April 24July 17June 7
ArugulaMay 17May 24June 6August 17
CucumberN/AN/AN/AN/A
Brussels SproutsN/AN/AN/AN/A
TomatoN/AN/AN/AN/A
SpinachMay 2May 12June 16August 10
BeetsMay 9thMay 19thJuly 8thJuly 13th
ZucchiniN/AN/AN/AN/A
CabbagesN/AN/AN/AN/A
PotatoMay 10May 20July 19July 3
RadishMay 19May 24June 21August 2
BroccoliMay 8May 18July 12July 8
CarrotMay 12May 26August 18June 15
CauliflowerMay 13May 20July 9July 16
OnionApril 12April 23August 19June 3

Herbs

PlantSow seeds indoorTransplanting to outdoorHarvesting MonthLast date
Lemon balmN/AN/AN/AN/A
MarjoramJune 11June 18July 23June 27
ParsleyApril 24May 14July 3July 20
DillN/AN/AN/AN/A
FennelApril 30May 14July 29July 6
SageN/AN/AN/AN/A
ThymeFebruary 29March 20May 19August 9
OreganoJanuary 24January 31March 16November 14
MustardMay 17May 24June 23July 31
MintN/AN/AN/AN/A
LavenderMay 10May 24July 3July 20
RosemaryApril 27May 12July 31June 26
GingerN/AN/AN/AN/A
BasilN/AN/AN/AN/A
CilantroN/AN/AN/AN/A