Super Sweet 100 Tomato Plants: Bold, Striped Harvests in 60 Days

Growing the Super Sweet 100 tomato plants means bold, striped harvests that taste like summer in every bite—60 days from transplant. 🌱 I’ve grown this heirloom for three seasons now, and the difference between these and store-bought tomatoes is night and day: sweet, juicy, and packed with flavor that keeps you reaching for more.

The secret isn’t complicated—it’s matching their needs exactly. These plants thrive in full sun (6-8 hours daily), well-draining soil rich in compost, and consistent moisture (never soggy). Start with sturdy seedlings, stake them early, and you’ll be snipping ripe tomatoes by midsummer.

The striped skins aren’t just pretty; they’re a sign of the plant’s vigor and sweetness. What you’ll end up with is a vibrant, productive vine that rewards patience with pounds of fruit—perfect for slicing, sauces, or fresh eating.

The first harvest is always a shockingly sweet surprise, and the plants keep producing until frost. Prune regularly to focus energy on fruit, and watch those heirloom beauties turn your garden into the talk of the neighborhood.

Works in containers or in-ground, whether you’re a beginner or a seasoned gardener. Let’s get those seeds (or seedlings) in the ground and turn your harvest into something legendary!

What you need

How to grow Super Sweet 100 tomatoes for bold, striped harvests

Here's my foolproof method for coaxing those iconic striped beauties from seed to table in just two months.

Fill 4-inch biodegradable pots with seed-starting mix (never garden soil—it's too dense) and moisten until damp like a wrung-out sponge. Plant 2 seeds per pot at ¼-inch depth, pressing gently but not firmly. The Super Sweet 100 variety germinates best in warmth, so place pots on a seedling heat mat set to 75-85°F. Cover with a clear dome or plastic wrap to trap humidity.

Check daily for condensation on the dome—this means moisture levels are perfect. Once 50% of seeds sprout (usually 5-10 days), remove the dome immediately to prevent damping-off. You'll see tiny white roots pushing through the drainage holes first—that's your signal germination is working.

Move seedlings under full-spectrum LED grow lights within 24 hours of sprouting. Position lights 2-3 inches above the plants and adjust height as they grow. Without enough light, seedlings stretch toward the source (called "legginess"), and those plants never recover. You'll know your setup is right when seedlings have thick stems, dark green leaves, and compact spacing between growth nodes.

When first true leaves appear (not the initial seed leaves), fertilize with half-strength liquid tomato fertilizer. I use a 10-10-10 mix diluted to ¼ strength weekly. Over-fertilizing now burns tender roots—always water first, then feed. Rotate pots quarter-turn daily so stems grow straight instead of leaning toward the light.

Two weeks before your last frost date, begin hardening off by placing pots in partial shade for 1 hour daily, gradually increasing to full sun over 10 days. Watch for wilting—this means they're not ready for longer exposure. Super Sweet 100s thrive in full sun (6-8 hours daily), but young plants need time to adjust to outdoor conditions.

Transplant on an overcast afternoon when soil temps are above 60°F. Bury stems deeper than usual—up to ⅔ of the stem—to encourage stronger root systems. Space plants 18-24 inches apart in rows 3 feet apart. Water deeply at transplanting to settle soil around roots, and mulch with 2-3 inches of straw to retain moisture and suppress weeds.

Water at the base (never overhead) when the top 2 inches of soil feel dry. Super Sweet 100s need 1-1.5 inches of water weekly, but drought stress causes blossom drop. You'll know your watering is right when leaves stay deep green and firm to touch—wilting or yellowing means adjust your schedule.

Prune suckers (the small shoots in the leaf axils) weekly to direct energy to fruit production. Leave 1-2 main stems per plant and remove any leaves below the first flower cluster to improve airflow. This prevents disease and ensures those striped beauties get maximum sunlight for sweetness. Harvest when fully colored and slightly soft—they won't ripen further off the vine.

Tips & tricks for growing Super Sweet 100 tomatoes

Here's what nobody tells you about growing these striped beauties—lessons I learned after losing three batches to common mistakes.

Germination Secret: The 75-85°F heat mat temperature is non-negotiable for Super Sweet 100 seeds. I learned this the hard way after seeds took 21 days to sprout in my 70°F kitchen. Place your pots on a heat mat immediately after planting—no waiting. For extra insurance, use a seedling heating pad under the pots during germination. The white roots pushing through drainage holes? That's your confirmation germination is working—don't wait for sprouts to appear above soil.

Lighting Hack: Those 2-3 inches above the plants for grow lights are crucial—any closer and you'll scorch tender seedlings, any farther and they'll stretch like leggy teenagers. I use a simple ruler to mark the exact height on my light fixture. Watch for leaves touching the light—this is your signal to raise it immediately. The 14+ hours of light requirement is strict; if your natural daylight drops below 12 hours, supplement with grow lights to prevent that classic "leggy" seedling syndrome.

Transplanting Wisdom: Burying stems up to ⅔ deep might seem counterintuitive, but it works magic for Super Sweet 100s. The buried portion will develop new roots, creating a stronger plant. I mark the original soil line with a pencil before transplanting to track how much I've buried. For the 60°F soil temperature requirement, use a soil thermometer—cold soil below 60°F shocks roots and delays establishment. An overcast afternoon gives plants time to acclimate without the stress of direct sunlight.

Watering Strategy: The 1-1.5 inches weekly water requirement assumes well-draining soil. If your garden soil is heavy clay, you'll need to water more frequently but less volume. I test soil moisture by pushing a finger 2 inches deep—if it's dry, water. The key is consistency: Super Sweet 100s hate moisture fluctuations. For container growing, use pots with drainage holes and water when the top inch feels dry. Mulching with 2-3 inches of straw keeps moisture levels stable and prevents soil-borne diseases from splashing up onto leaves.

Frequently asked questions

How long does it take for Super Sweet 100 tomatoes to mature?

The Super Sweet 100 is a determinate variety, meaning it matures quickly—typically 60–65 days from transplanting to harvest. Start seeds indoors 6–8 weeks before your last frost date for a summer-long bounty. Pro tip: Use a heat mat if your home is chilly to speed up germination!

Can I grow Super Sweet 100 in containers?

These compact plants thrive in 5-gallon containers or larger. Just ensure the pot has drainage holes and use a high-quality potting mix with added compost. Place containers in full sun (6+ hours/day) and fertilize every 2–3 weeks for maximum yield.

What pests or diseases should I watch for?

Common issues include hornworms, aphids, and early blight. Prevention tips:

• Rotate crops yearly to avoid soil-borne diseases.
• Handpick pests (hornworms are sneaky—check leaves daily!).
• Avoid overhead watering to prevent fungal growth.

What are the best companion plants for Super Sweet 100?

Pair these tomatoes with basil, marigolds, or onions to repel pests and boost flavor. Avoid planting near:

• Fennel or brassicas (kale, cabbage)—they stunt tomato growth.
• Corn—it attracts tomato fruitworms.

When is the best time to harvest Super Sweet 100 tomatoes?

Harvest when tomatoes are fully colored, firm, and slightly soft to the touch—usually 60+ days after transplanting. Pick them before the first frost to preserve sweetness. Storage tip: Keep unripe tomatoes at room temp; ripen them in a paper bag with a banana for speed!

What if my Super Sweet 100 plants stop producing?

Common reasons include:

• Overwatering or poor drainage—let soil dry slightly between waterings.
• Too much nitrogen—switch to a phosphorus-rich fertilizer (like 5-10-10) to encourage fruiting.
• Heat stress—provide afternoon shade in 90°F+ temps.

Wrapping up and next steps

Growing Super Sweet 100 tomato plants is a rewarding journey that delivers bold, striped harvests in just 60 days—perfect for impatient gardeners! 🌱 With the right companion plants, soil prep, and care, you’ll enjoy juicy, flavor-packed tomatoes that outshine store-bought varieties.

Whether you’re a beginner or a seasoned gardener, this fast-growing variety proves that big rewards come from small, strategic steps.

Ready to dive in? Start by gathering your supplies, choosing the perfect spot, and planting your seeds or seedlings this weekend. Your garden—and taste buds—will thank you! 🌿🍅