Hawaiian Rainbow
Corn
🌱 75d to harvest
Upright
Feel the first silk-bright glow as the ears emerge—Hawaiian Rainbow corn develops striking, multicolored kernels that shimmer lik…
Crop Dates
| Milestone | Date |
|---|---|
| Start Indoors | Direct Sow |
| Last Frost | Jan 1st |
| Transplant / Sow Outdoors | Jan 1st |
| Harvest Begins | Mar 17th |
| Harvest Ends | Dec 31st |
Crop Details
| Trait | Value |
|---|---|
| Days to Maturity | 75 |
| Sun Requirements | Full Sun |
| Growth Habit | Upright |
| Support Needed | None |
| Planting Depth | Normal |
| Germination Temp (°F) | 55 |
| Min Soil Temp (°F) | 55 |
| Min Night Temp (°F) | 28 |
| Harden Off (days) | Not Required |
Recommended Companions
Frequently Asked Questions
What pest or disease problem is most common on sweet corn (Zea mays var. saccharata) and how do I treat it?
Corn earworm and fall armyworm are common on sweet corn, with larvae boring into developing ears. Inspect weekly once silks appear, then apply a labeled Bt product (Bacillus thuringiensis) aimed at corn caterpillars as soon as you see fresh feeding or early frass. If you notice smut galls (black, swollen kernels) on ears, remove and discard the affected parts promptly to reduce spread to nearby plants.
How often should I water sweet corn during the main growing phase (after tassel and ear formation)?
During tassel-to-ear-filling, keep the soil consistently moist but not waterlogged, aiming for about 1 to 1.5 inches of water per week depending on heat and rainfall. Water deeply 1–2 times per week so the moisture reaches deeper roots; shallow daily watering often leaves corn drought-stressed at ear depth. Mulch lightly around plants to reduce surface drying, and increase watering if leaves start to fold or turn dull-gray.
How can I tell when Hawaiian Rainbow sweet corn is ready to harvest?
Harvest about 20–25 days after the silks first emerge and when the tassels have begun to dry. Kernels should feel plump and release a milky, whitish liquid when pressed with a fingernail; if the liquid is watery or clear, leave it a few more days. Pick in the morning for the sweetest flavor, and harvest every day or two as ears ripen quickly.
Feel the first silk-bright glow as the ears emerge—Hawaiian Rainbow corn develops striking, multicolored kernels that shimmer like stained glass in the garden. The kernels are firm and pleasantly crisp, with a vivid spectrum that makes each ear a living centerpiece. Grow it for ornamental impact in beds and borders, and for show-stopping displays of color that shine at harvest and beyond.
Sowing Tips
Transplant Conditions
Wait until soil reaches 55°F and nights stay above 28°F before moving outdoors.
Expert Note
Plant in blocks (not rows) for better pollination, and keep soil evenly moist during ear formation.