Yes, you can propagate tomato plants from cuttings, and it's faster than starting from seed

You can grow a new tomato plant from a cutting taken from an existing plant. The cutting will be genetically identical to the parent plant, so if you have a tomato variety you like, you can clone it. This method works because tomato stems develop roots when placed in water or moist soil, usually within one to three weeks.

Propagation from cuttings is faster than growing from seed — you skip the germination stage and start with a plant that's already partway to maturity. The downside is that cuttings are more fragile than seeds and need consistent moisture and warmth to root successfully. You also need a healthy parent plant to take cuttings from, whereas seeds can be stored and used anytime.

Key Takeaways

  • Cut a 4- to 6-inch stem from new growth on a healthy tomato plant, remove the lower leaves, and place it in water or moist potting soil.
  • Roots typically appear within one to three weeks if you keep the cutting warm (65 to 75 degrees Fahrenheit) and the medium consistently moist.
  • Once roots are at least half an inch long, transplant the cutting into soil and treat it like a young seedling until it's large enough to harden off outdoors.
  • Propagation works best in spring and early summer when the parent plant is actively growing and temperatures are warm.
  • Cuttings taken from suckers (shoots that grow between the main stem and branches) root faster than cuttings from the main stem.

What part of the plant to cut and when

Take cuttings from new, tender growth rather than woody, mature stems. The best cuttings are 4 to 6 inches long and come from the top of the plant or from suckers — the small shoots that grow in the angle between the main stem and a branch. Sucker cuttings root faster than main-stem cuttings because they're younger tissue.

Cut in the morning when the plant is fully hydrated. Use a clean knife or pruners and make the cut just below a leaf node (the bump on the stem where leaves attach). Nodes contain the cells that will become roots, so cutting below one increases your success rate.

The best time to propagate is late spring through mid-summer, when the parent plant is growing vigorously and outdoor temperatures are warm. Cuttings taken in fall or winter root slowly or not at all because the plant is slowing down and light levels are low.

Preparing the cutting for rooting

Remove all leaves from the bottom half of the cutting. Leaves that sit in water or soil will rot and create conditions for fungal disease. Leave the top two or three sets of leaves intact — the cutting needs them to photosynthesize and fuel root development.

You can dip the cut end in rooting hormone powder if you have it, though it's not required for tomatoes. Tomatoes root readily without it. If you use rooting hormone, follow the package instructions and tap off excess powder before placing the cutting in water or soil.

Rooting in water versus soil

Both methods work. Water rooting is simpler to monitor — you can see roots developing and change the water every few days to prevent bacterial buildup. Use a glass or jar filled with room-temperature water, and place it in bright, indirect light. Roots usually appear within one to three weeks.

Soil rooting is faster overall because the cutting doesn't have to adjust to soil after rooting. Fill a small pot with moist potting soil, make a hole with your finger, insert the cutting, and firm the soil gently around it. Cover the pot with a clear plastic bag or dome to hold humidity, and place it in warm, bright, indirect light. Check the soil every few days and mist if it's drying out. Roots develop in one to three weeks, and the cutting is already in soil when they appear.

Whichever method you choose, keep the cutting warm — between 65 and 75 degrees Fahrenheit is ideal. Cooler temperatures slow rooting. Avoid direct sun, which can stress the cutting before it has roots to absorb water.

Transplanting rooted cuttings into soil

Once roots are at least half an inch long, the cutting is ready to move to soil (if it rooted in water) or to a larger pot (if it rooted in a small container). Use standard potting soil, not garden soil, because potting soil drains better and is less likely to compact.

Bury the cutting deep — up to the lowest remaining leaves. Tomato stems can develop roots all along their length, so deeper planting creates a stronger root system. Water gently and place the pot in bright, indirect light. Keep the soil consistently moist for the first week, then water when the top inch feels dry.

At this stage, the cutting is a young seedling. It needs warmth (around 70 degrees Fahrenheit), bright light (at least 14 hours a day), and protection from wind and direct sun. If you're growing it indoors under lights, keep the lights 2 to 3 inches above the leaves and raise them as the plant grows.

Hardening off and moving outdoors

After four to six weeks indoors, the cutting should be 6 to 8 inches tall with several sets of true leaves. Before planting it outside, you need to harden it off — gradually expose it to outdoor conditions so it adjusts to wind, direct sun, and temperature swings.

Start by placing the pot in a sheltered, shaded spot outdoors for an hour or two. Each day, increase the time outside and gradually move it into more direct light. After seven to ten days of gradual exposure, the plant is ready to stay outside full-time. Plant it in the garden once nighttime temperatures stay above 50 degrees Fahrenheit and the soil has warmed.

Common problems and how to fix them

If the cutting wilts or the leaves turn brown and papery, the air is too dry or the light is too intense. Move it to a shadier spot, increase humidity by misting the leaves, or cover it loosely with a plastic bag for a few days.

If the cutting sits in water for weeks without rooting, the water may be stagnant or the temperature too cold. Change the water every three days and move the cutting to a warmer location. If the cutting is mushy or smells bad, it has rotted — discard it and start over with a fresh cutting.

If the rooted cutting grows tall and spindly indoors, it's not getting enough light. Move it closer to a window or under grow lights. Leggy seedlings can be buried deeper when transplanted, which helps them develop a stronger root system.

Frequently Asked Questions

Can I propagate a tomato plant in winter?

Technically yes, but success rates drop sharply. Cuttings root slowly in cold temperatures and short days. If you want to propagate in winter, keep the cutting in a warm spot (70 to 75 degrees Fahrenheit) under grow lights for at least 16 hours a day. Spring and summer are much easier.

How many cuttings should I take from one plant?

You can take several cuttings from a healthy plant without harming it. Taking suckers is actually beneficial — it directs energy into fruit production. Limit yourself to a few cuttings per plant so you're not removing too much foliage at once.

Will a cutting from a determinate tomato grow into a determinate plant?

Yes. The cutting will be genetically identical to the parent plant, so a cutting from a determinate variety will grow into a determinate plant, and a cutting from an indeterminate variety will grow indeterminate. The growth habit doesn't change.

Can I propagate a tomato plant from a leaf?

No. Tomato leaves don't root and won't develop into new plants. You need a stem cutting that includes at least one leaf node. Some plants (like African violets) can be propagated from single leaves, but tomatoes cannot.

What's the difference between a sucker and a regular branch?

A sucker is a thin shoot that grows in the crotch between the main stem and a branch. It's younger tissue and roots faster than a cutting from the main stem or a thick branch. Removing suckers also improves air circulation and directs the plant's energy into fruit rather than foliage.