Planting tomatoes in plug plants

Planting tomatoes in plug plants

An economical and easy solution

Contents

Modified the 20 March 2025  by Ingrid B. 3 min.

Planting tomatoes in plug plants is a cost-effective way to obtain healthy seedlings. It’s very convenient, as there’s no need to sow: your tomatoes are ready to go straight into the vegetable patch if outdoor temperatures allow. Otherwise, here are some tips for caring for them until you can plant them in the garden once the warmer weather arrives. Thanks to this method, you save time while ensuring good plant establishment. Discover our tips for successfully growing tomatoes from plug plants and achieving an abundant harvest!

Winter, Spring Difficulty

Where to plant your tomato plug plants?

Tomatoes need warmth and at least 6 hours of sunlight per day to fruit. They should be planted in full sun, ideally sheltered from cold winds. Therefore, observe your garden carefully to determine its sunlight exposure and choose the most suitable location accordingly. Planting under cover (greenhouse, polytunnel, heated or unheated) can be a good solution in cooler or rainier regions, as well as for bringing forward the harvest.

What type of soil or substrate should I use for planting tomato plug plants?

Tomatoes require fertile, nutrient-rich and well-aerated soil to allow the plant to develop its roots easily. Adding well-rotted compost or manure, about 3 kg per square metre, is recommended.

When and how to plant?

Our tomato plug plants require immediate care that cannot wait: remove them from their transport shells as soon as you open your parcel and soak them if necessary in a shallow amount of lukewarm water. Never plant a dry plug.

Depending on your region and the calendar:

1) The last frost risks have passed: plant directly without delay, either in pots or in the garden.

2) Frost risks are still present: while waiting for final planting (after the “Ice Saints”), pot up the plugs as follows:

  • Pot them on into containers or pots, using a rich and light substrate (ideally potting compost)
  • Transplant by placing the plug in the pot, after making a hole large enough to accommodate it. Bury the plant up to the cotyledons (the first two leaves that don’t resemble the subsequent leaves), the buried stem will develop new roots,
  • Keep your plants in a warm and bright location and remember to water: the substrate should remain moist but not waterlogged.
Tomato plug plant potted on

Pot up and allow to grow in a heated space

If possible, about ten days before final planting in the vegetable garden, gradually acclimatise your young plants to outdoor conditions by taking them outside for a few hours each day in fine weather: the slightly cooler temperatures and a gentle breeze will help them harden off and arrive in the garden strong and stocky.

When planting, space plants 50 to 60cm apart in all directions. You can plant a little earlier if you live in a mild climate or have protection (heated or unheated greenhouse).

Note: if your plants are grafted, be careful not to bury the graft union.

grafted tomato plug plant