When to Plant Watercress in Prince of Wales-Hyder, AK
Watercress is a semi-aquatic plant with a peppery, tangy flavor rich in vitamins and minerals. It grows naturally along streams and can be cultivated in containers with standing water.
Prince of Wales-Hyder, Alaska is in USDA Zone 7b. The average last spring frost is April 13 and the first fall frost is November 1, giving you a growing season of approximately 202 days.
At an elevation of 257 feet, Prince of Wales-Hyder receives approximately 14.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 70°F, so choose short-season varieties of Watercress to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Watercress successfully. Mulch heavily to conserve soil moisture.
Prince of Wales-Hyder Soil Profile
Soil Type
Silt Loam
Soil pH
5.2-6.8
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Plant Water Budget
Watercress Planting Timeline — Prince of Wales-Hyder, AK
Watercress Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 9 | Mar 9 – Mar 23 |
| Transplant Outdoors | April 13 | Apr 13 – Apr 27 |
| Direct Sow | March 30 | Mar 30 – Apr 20 |
| Fall Sowing | August 23 | Aug 23 – Sep 6 |
| Harvest | May 25 | May 25 – Jun 29 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | — |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Partial Shade (3-6 hours)
Water
High — keep soil consistently moist
Days to Maturity
40–60 days
Soil pH
6.5 – 7.5
USDA Zone
Zone 7b
Growing Season
202 days
Growing Tips for Prince of Wales-Hyder
Grow in containers with trays of water kept fresh. Provide partial shade and cool conditions. Harvest stems by cutting above water level. Replace water frequently to prevent stagnation.
Companion Planting
Good Companions
Level Up Your Garden
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Frequently Asked Questions
When should I plant Watercress in Prince of Wales-Hyder, AK?
Prince of Wales-Hyder is in Zone 7b with an average last frost of April 13. Plan your Watercress planting based on this frost date — see the calendar above for exact timing.
What planting zone is Prince of Wales-Hyder, AK?
Prince of Wales-Hyder, Alaska is in USDA Hardiness Zone 7b. The average last spring frost is April 13 and first fall frost is November 1.
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