Heidi

Tomato

Zone 4b Save Garden

🌱 75d to harvest Indeterminate

Heidi delivers a rich, slow-simmering tomato flavor in a compact paste package—fragrant, deeply sweet, and pleasantly tangy from …

Crop Dates

Milestone	Date
Start Indoors	Mar 25th
Last Frost	May 13th
Transplant / Sow Outdoors	Jul 8th
Harvest Begins	Sep 21st
Harvest Ends	Sep 27th

Crop Details

Trait	Value
Days to Maturity	75
Sun Requirements	Full Sun
Growth Habit	Indeterminate
Support Needed	Stake
Planting Depth	Deep
Germination Temp (°F)	75
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	10

Recommended Companions

Piccolino Basil Basil

Frequently Asked Questions

What pest or disease is most likely on Solanum lycopersicum (tomato), and how should I manage it?

Watch for Early blight (Alternaria) and leaf-spotting that starts on older leaves near the soil line, often with yellowing and dark concentric spots. Remove and discard infected leaves promptly, water at the base (not overhead), and mulch to keep soil splash off the plants. If it keeps spreading, apply a labeled fungicide for tomatoes early in the outbreak and reapply according to the label schedule.

How often should I water Solanum lycopersicum during the main growing phase?

During active flowering and fruit set, keep soil consistently moist but not waterlogged—about 1–2 inches of water per week depending on heat and container size. Water deeply 1–2 times per week rather than frequent light watering, and aim for evenly moist soil to prevent blossom-end rot and cracking. In hot weather, check daily and water when the top 1 inch of soil dries out.

How can I tell when Solanum lycopersicum (tomato) ‘Heidi’ is ready to harvest?

Harvest when fruits are fully colored for the variety and feel firm but give slightly when gently squeezed. Use the fruit’s “shoulders”—if the green area at the top near the stem has disappeared and the skin looks glossy, it’s usually ready. For best flavor, pick at peak color and avoid pulling; twist gently and leave the stem end intact.

Heidi delivers a rich, slow-simmering tomato flavor in a compact paste package—fragrant, deeply sweet, and pleasantly tangy from first bite to last. At maturity, the fruit turns a vivid, classic red with a dense, meaty texture and few seeds, making it exceptionally satisfying for thick, spoonable results. Grow Heidi for dependable harvests of uniform paste tomatoes that shine in sauces and preserves, where their bold character really stands out.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 10 days first.

Expert Note

Start indoors early, keep seedlings consistently warm (especially nights), and transplant only when soil is truly 60°F+ for reliable set and disease-resistant performance.