Window Box Roma

Family: Solanaceae Nightshade

Planting Schedule

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Sun-warmed sweetness bursts from Window Box Roma’s petite cherry fruits—bright, true-red globes with a glossy skin that catches the light like lacquer.

The flesh is firm yet juicy, with a pleasantly dense, Roma-style bite that shines in thick, flavorful preparations. Grow it for abundant harvests on a compact, container-friendly plant, then enjoy its bold tomato character in sauces, roasting, and preserves where concentrated flavor matters most.

Light: Full SunMaturity: 70 DaysHabit: Determinate

Botanical illustration of Window Box Roma

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Window Box Roma 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	Sep 28th – Aug 29th
Zone 2b	Mar 27th	Jul 10th	Sep 18th – Aug 25th
Zone 3a	Mar 27th	Jul 10th	Sep 18th – Sep 1st
Zone 3b	Mar 31st	Jul 14th	Sep 22nd – Sep 21st
Zone 4a	Mar 27th	Jul 10th	Sep 18th – Sep 24th
Zone 4b	Mar 25th	Jul 8th	Sep 16th – Sep 27th
Zone 5a	Mar 20th	Jul 3rd	Sep 11th – Sep 30th
Zone 5b	Mar 16th	Jun 29th	Sep 7th – Oct 5th
Zone 6a	Mar 13th	Jun 26th	Sep 4th – Oct 10th
Zone 6b	Mar 7th	Jun 20th	Aug 29th – Oct 16th
Zone 7a	Mar 2nd	Jun 15th	Aug 24th – Oct 20th
Zone 7b	Feb 20th	Jun 5th	Aug 14th – Oct 28th
Zone 8a	Feb 11th	May 27th	Aug 5th – Nov 5th
Zone 8b	Feb 2nd	May 18th	Jul 27th – Nov 12th
Zone 9a	Jan 16th	May 1st	Jul 10th – Nov 26th
Zone 9b	Dec 22nd	Apr 6th	Jun 15th – 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	70
Sun Requirements	Full Sun
Growth Habit	Determinate
Support Needed	Cage
Planting Depth	Deep
Germination Temp (°F)	75
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	8

Culinary Notes

Chef's Note

These petite, Roma-leaning cherry tomatoes give you concentrated fruitiness without the watery drag—great for reductions that actually thicken. The firm flesh holds its shape under heat, so roasted or simmered versions taste like real tomato, not just sauce.

Best Uses

sheet-pan roasting until jammy and slightly blistered
thick cherry-tomato passata/sauce reductions (no watery boil-off)
quick pickling for bright, tangy pop
stewing into hearty bean/chicken dishes where it won’t collapse

Flavor Profile

sweet, sun-warmed tomato bursts true-red acidity with a clean snap firm, dense Roma-style flesh that stays structured glossy, thin skin that pops when roasted

Kitchen Pairings

garlic olive oil black pepper balsamic vinegar mozzarella parmesan

Frequently Asked Questions

What pest or disease issue is most common on Solanum lycopersicum (tomatoes) in window boxes, and how can I control it?

In window boxes, tomatoes (Solanum lycopersicum) commonly get early blight (Alternaria) and leaf spot, especially when leaves stay wet. Remove infected lower leaves as soon as you see yellowing/brown spots, water at the soil line (not on foliage), and improve airflow by spacing plants and keeping the box from staying humid. If it keeps spreading, treat with a labeled tomato fungicide and follow the product’s interval for repeat sprays.

How often should I water Solanum lycopersicum during the main growing phase in a window box?

During fruiting (roughly after flowering begins through harvest), keep the potting mix evenly moist but not waterlogged—aim for watering whenever the top 1 inch of mix feels dry. Window boxes dry out fast in full sun, so many home gardeners end up watering daily in hot weather, but less often in cooler periods. Water thoroughly until excess drains out, then empty the saucer so roots of this Solanaceae don’t sit in water.

How do I know when my Solanum lycopersicum is ready to harvest?

Harvest when fruits are fully colored for their variety and show a slight give when gently squeezed—typically around 70 days to maturity. Pick frequently because tomatoes continue producing; if you wait for every fruit to ripen fully, later clusters slow down. For best flavor, harvest at peak ripeness rather than letting them over-soften on the plant.