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Ace 55 Tomatoes

Determinate · Solanaceae

Ace 55 is a dependable determinate slicer that produces medium to medium-large red fruit with low acidity and mild, hearty flavor. The compact bush habit makes it beginner-friendly and easier to manage in cages or large patio containers. Its key distinction is reliable production paired with useful VF disease resistance. Key facts: 75–80 days to maturity, 6+ hours of sun, 24–36 " spacing. Container-friendly (minimum 5-gallon pot). Requires cage for best results.

Updated April 19, 2026 · Backed by 1 cited source
Overview

At a Glance

The essentials first: timing, light, spacing, seed-starting, container fit, and overall size.

Days to maturity
75–80 days
Sun
6+ hours
Full Sun, 8 12 Hours
Spacing
24–36 "
between plants
Seed start
6–8 weeks
before transplant
Container
Yes
5+ gallon pot
Height
3–4 ft
at maturity
Planting window

Zone Planting Guide

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Care

Growing Guide

Everything in one place: seed starting, transplant timing, watering, soil, and structural support.

Seed starting
Germination
Time6–12 days
Optimal temperature82°F
Seed depth0.125"
Moving outdoors
Transplanting
Minimum soil temp60°F
Harden off10 days
Moisture
Watering
Weekly1–2 "
NeedsConsistent
Drip
Root zone
Soil
pH range6–6.8
PreferredRich, Well Drained Loam
Structure
Support
TypeCage — A 4-foot cage is usually enough; plants stay compact but benefit from support to keep fruit off the soil.
Tomato - Ace 55 seeds

Recommended seeds · paid link ?When you shop through this link, SoilStack earns a small commission at no extra cost to you. It's how we keep the site free and the calendar ad-free. Every product on this page was hand-selected based on university extension research.

When you shop through this link, SoilStack earns a small commission at no extra cost to you. It's how we keep the site free and the calendar ad-free. Every product on this page was hand-selected based on university extension research.

Tomato - Ace 55 seeds

Determinate. 75-80 days. The Ace 55 Tomato is a cultivar known for its consistent production of medium-to-large red tomatoes.

Shop on Seeds Now
Resilience

Plant Health

Stress tolerance, resistance notes, and the most common problems to watch for as plants mature.

Tolerance
Heat: Moderate Cold: Low Drought: Low
Disease resistance
VF

Common Issues

Blossom Drop

Cause: Temperature extremes — daytime >90F or nighttime >75F

Prevention: Shade cloth 30-40% in extreme heat.

Blossom End Rot

Cause: Calcium transport disruption from inconsistent watering

Prevention: Consistent watering + Cal-Mag at flowering stage

Feeding & picking

Nutrition & Harvest

How hungry the plant is, what ripe harvest looks like, and how long the crop keeps after picking.

Feeding
Nutrition
Feeding intensityHeavy feeder
CalciumCritical — supplement recommended
RecipesRoot Drench, Silica Foliar, Worm Castings Topdress, Compost Tea
Timing
Harvest

Harvest when fruits are fully red and firm-ripe; they hold well on the plant but are best picked before becoming overly soft.

Expected yield6–10 lbs/plant
Storage7 days — Counter at room temp (55-70F) stem-side down. Never refrigerate — kills flavor.

Recommended fertilizer · paid link ?When you shop on Amazon using this link, SoilStack earns a small commission at no extra cost to you. It's how we keep the site free and the calendar ad-free. Every product on this page was hand-selected based on university extension research.

When you shop on Amazon using this link, SoilStack earns a small commission at no extra cost to you. It's how we keep the site free and the calendar ad-free. Every product on this page was hand-selected based on university extension research.

Espoma Tomato-Tone (4lb)

The fertilizer extension agents recommend. 3-4-6 NPK with 8% calcium to prevent blossom end rot. From the brand that's been in business since 1929.

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Plant relationships

Companion Planting

Helpful neighbors can support growth or deter pests. Keep antagonistic plants separated to reduce stress and competition.

Avoid planting near
Herb Fennel
What you'll need

Growing Supplies

Based on Ace 55's growth profile -- recommendations matched to this variety's specific requirements.

Drip irrigation / soaker hose kit

Every gardener benefits from putting water at the root zone instead of on the leaves, because drip and soaker systems reduce foliar disease pressure by limiting leaf wetness and soil splash. A quality kit should include a backflow preventer, filter, pressure reducer, and UV-resistant tubing.

Source: Iowa State University Extension; Colorado State University Extension; UMass Extension

Soil test kit

A soil test gives a baseline for pH and nutrient status so gardeners can add only what the soil actually needs. Prioritize a mail-in or lab-affiliated kit whenever possible because extension guidance notes that laboratory testing is more accurate than instant readers.

Source: University of Maryland Extension; Purdue Extension; Montana State University Extension

Quality bypass pruners

Extension guidance favors bypass designs because they make cleaner, closer cuts on living tissue than anvil types. Look for hardened steel blades that can be sharpened, a comfortable grip, and a cutting capacity matched to real home-garden stems.

Source: University of New Hampshire Extension; Iowa State University Extension; Purdue University Extension

These are Amazon affiliate links -- if you buy through them, SoilStack earns a small commission at no extra cost to you. It's how we keep the app free and the calendar ad-free. We only link products that match what the research says you actually need.
Research

Sources

Reference material and extension guidance used to build this growing guide.

reference SeedsNow, Tomato - Ace 55 (Determinate), lists 75-80 days to maturity from transplant.
Internal links

Ace 55 Tomatoes Planting Dates by Zone

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