Heidi

Family: Solanaceae Vegetable

Planting Schedule

Provide your location or planting zone to unlock dates and add Heidi to a garden.

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.

Light: Full SunMaturity: 75 DaysHabit: Indeterminate

Location not set yet

Enter your ZIP for local crop dates

Heidi Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	Apr 6th	Jul 20th	Oct 3rd – Aug 29th
Zone 2b	Mar 27th	Jul 10th	Sep 23rd – Aug 25th
Zone 3a	Mar 27th	Jul 10th	Sep 23rd – Sep 1st
Zone 3b	Mar 31st	Jul 14th	Sep 27th – Sep 21st
Zone 4a	Mar 27th	Jul 10th	Sep 23rd – Sep 24th
Zone 4b	Mar 25th	Jul 8th	Sep 21st – Sep 27th
Zone 5a	Mar 20th	Jul 3rd	Sep 16th – Sep 30th
Zone 5b	Mar 16th	Jun 29th	Sep 12th – Oct 5th
Zone 6a	Mar 13th	Jun 26th	Sep 9th – Oct 10th
Zone 6b	Mar 7th	Jun 20th	Sep 3rd – Oct 16th
Zone 7a	Mar 2nd	Jun 15th	Aug 29th – Oct 20th
Zone 7b	Feb 20th	Jun 5th	Aug 19th – Oct 28th
Zone 8a	Feb 11th	May 27th	Aug 10th – Nov 5th
Zone 8b	Feb 2nd	May 18th	Aug 1st – Nov 12th
Zone 9a	Jan 16th	May 1st	Jul 15th – Nov 26th
Zone 9b	Dec 22nd	Apr 6th	Jun 20th – Dec 9th
Zone 10a	Continuous Production
Zone 10b	Continuous Production
Zone 11a	Continuous Production
Zone 11b	Continuous Production
Zone 12a	Continuous Production
Zone 12b	Continuous Production
Zone 13a	Continuous Production
Zone 13b	Continuous Production

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

Culinary Notes

Chef's Note

Heidi’s compact paste structure—meaty, low-seed, and stubbornly concentrated—turns into a sauce that coats a spoon instead of thinning out. It brings fragrant sweetness with assertive tang, so it holds up beautifully to long reductions and gets along fast with salty, pungent partners.

Best Uses

slow-reduced tomato sauce for pasta (thick, spoon-coating)
thick purée for shakshuka-style simmering
jammy preserves and roasted tomato ketchup-style reductions
concentrated base for braises and soups where you want texture

Flavor Profile

deep, slow-cooked tomato sweetness pleasant tang with a clean finish dense, meaty flesh and low-seed bite

Kitchen Pairings

garlic olive oil anchovies parmesan red wine vinegar balsamic vinegar

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.