Best Time to Plant Tomatoes

Outdoor Planting (Transplants)

• In Nashville and Middle Tennessee, the ideal window to transplant tomatoes outdoors is generally late April through early May.

• This timing corresponds with about 10–14 days after the average last spring frost, which in Middle TN usually falls in mid- to late-April.

• Many local gardeners wait until around Mother’s Day (second Sunday in May) to be extra safe from late frosts.

Soil Temperature

• Tomatoes need soil consistently above ~60°F (about 15–16°C) at about 4″ depth before planting outdoors.

• Air temperatures, especially nighttime lows, should stay above about 50–55°F after transplanting to avoid stress or stunting.

Where to Plant

• Choose a spot with full sun — at least 6–8 hours of direct sunlight daily.

• Tomatoes prefer well-drained soil with good organic matter. Amending clayey Middle TN soil with compost improves structure and fertility.

Planting & Care Tips

• Spacing:

  • Determinate (bush) varieties: ~24–30″ apart.

  • Indeterminate (vining) types: ~30–36″ apart, with rows ~36–48″ apart.

• Supports: Stake, cage, or trellis plants to keep fruit off the ground.

• Watering: Keep soil evenly moist (not soggy) once established.

• Mulch: Helps retain moisture and suppress weeds.

How Long Before Harvest?

• Most tomatoes take ~60–85 days from transplant to harvest, depending on the variety.

• In Middle TN, this means you can expect ripe tomatoes from June or July through early fall if planted at the right time.

Local Tips

• Weather in early April can still dip low — so don’t rush — prepare protection (row cover) if a late frost threatens.

• Tomatoes usually produce well into July and later, but careful watering and heat management matter.

 

The difference between determinate and indeterminate tomatoes comes down to how they grow and produce fruit.

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Determinate Tomatoes (Bush Type)

How they grow:

• Grow to a set height (usually 3–4 feet)

• Stop growing once flowers form at the top

• More compact and bushy

How they produce:

• Produce most of their fruit all at once (over 2–3 weeks)

• Great for canning or making sauce in bulk

Care needs:

• Less staking or pruning required

• Good for containers and small gardens

Good examples:

• Roma

• Celebrity

• Bush Early Girl

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Indeterminate Tomatoes (Vining Type)

How they grow:

• Keep growing and vining until frost

• Can reach 6–12+ feet tall

• Continue producing new flowers all season

How they produce:

• Steady harvest from summer until first frost

• Best for fresh eating throughout the season

Care needs:

• Need strong staking, cages, or trellising

• Benefit from regular pruning

Good examples:

• Brandywine

• Better Boy

• Cherokee Purple

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Quick Comparison

 

Companion Plants for Tomatoes

Best Companions

• Basil
  Improves flavor (many gardeners swear by it!) and helps repel hornworms and flies.

• Marigold
  Helps deter nematodes and some insect pests.

• Nasturtium
  Acts as a trap crop for aphids and attracts pollinators.

• Carrot
  Loosens soil around tomato roots.

• Onion & Garlic
  Help repel aphids and other pests.

Avoid Near Tomatoes

• Corn (shared pests like hornworms)

• Fennel (inhibits growth)

• Potatoes (shared diseases like blight)

Multi-Crop Companions (Work Well With Squash and Cucumbers too)

• Calendula

• Sweet alyssum

• Chives

• Parsley

These attract pollinators and beneficial insects like ladybugs and parasitic wasps.