When to plant Hyacinths in Henry County, IL
Spring Hyacinths in Henry County goes in mid-spring–late spring, once nighttime temps stop dipping near freezing. A second sowing from September 4 to September 18 extends the harvest into fall.
When to Plant Hyacinths in Henry County, IL
Hyacinths (Hyacinthus orientalis) fill the spring garden with an almost overwhelming fragrance — a single cluster of blooms can perfume an entire yard. Dense, upright spikes of waxy florets in shades of purple, pink, blue, white, and red emerge in mid-spring, bridging the gap between the first crocus and the tulip peak. Though bulbs bloom most spectacularly in their first year, established plantings continue to produce graceful, less-dense flower spikes for several years. Deer and rabbits avoid them due to toxic alkaloids.
Henry County, Illinois is in USDA Zone 5b. The average last spring frost is April 16 and the first fall frost is October 16, giving you a growing season of approximately 183 days.
At an elevation of 593 feet, Henry County receives approximately 31.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Hyacinths during the growing season.
Henry County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Hyacinths Planting Timeline — Henry County, IL
Hyacinths Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Bloom | August 14 | Aug 14 – Sep 11 |
| Fall Sowing | September 4 | Sep 4 – Sep 18 |
Plant 6" deep · 6" apart · Rows 8" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | — |
| June | — |
| July | — |
| August | Bloom |
| September | Fall Sowing Bloom |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Low — drought tolerant
📅 Days to Maturity
14–28 days
🧪 Soil pH
Needs 6–7.5 · Your soil: N/A
🗺️ USDA Zone
Zone 5b
📆 Growing Season
183 days in Henry County
Growing Tips for Henry County
Plant bulbs 6 inches deep and 6 inches apart in fall, when soil drops below 60°F. Wear gloves when handling — bulb sap causes contact dermatitis in some people. After bloom, deadhead the spent spike but leave the strap-like foliage until it yellows naturally. For naturalizing, plant at 6–8 inch spacings and allow clumps to mature undisturbed. In zones 7b–9b, treat bulbs as annuals or use pre-chilled stock; performance after year 1 declines in warm-winter zones. For forcing indoors, chill bulbs 10–12 weeks then bring into warmth.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Hyacinths in Other Locations
Frequently Asked Questions
When should I plant Hyacinths in Henry County, IL?
Henry County is in Zone 5b with an average last frost of April 16. Plan your Hyacinths planting based on this frost date — see the calendar above for exact timing.
What planting zone is Henry County, IL?
Henry County, Illinois is in USDA Hardiness Zone 5b. The average last spring frost is April 16 and first fall frost is October 16.
When should I plant Hyacinths in Henry County, IL?
In Henry County, IL, plant Hyacinths after the last frost (around April 16) and before the first frost (around October 16). Best results when soil holds above 50°F.
What growing zone is Henry County, IL for Hyacinths?
Henry County sits in USDA Zone 5b. Hyacinths grows reliably in zones 3a through 9b, so it's a good fit here.
Can Hyacinths grow in Henry County's climate?
Yes — Hyacinths grows well in Henry County's temperate climate. Henry County averages a 183-day frost-free season, with last frost around April 16 and first frost around October 16.
Your Henry County Garden Planner — Free
A 22-page printable planner built for Henry County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.