How to Grow articles share practical steps to growing food, flowers and ornamental plants in your garden – indoors and out! Learn more about what to plant when, moon gardening and choosing seedlings and plants to save money.
Tomatoes are delicious herbaceous annuals and one of the easiest crops you can grow, even in a small space. If you’re a beginner gardener or had challenges, follow these practical tips for growing terrific tomatoes and a healthy abundant harvest.
Tomato Growing Guide
How to Select Tomatoes
Tomatoes (Solanum lycopersicum syn Lycopersicon esculentum) are members of the Solanaceae (Nightshade) plant family. Their relatives include potatoes, chilli, capsicum and eggplant. There are a huge number of varieties. So, how do you narrow it down to what is best for you?
Obviously, the most important consideration is to choose cultivars suited to your climate. Locally adapted tomatoes tend to be more resilient to weather conditions, pests and diseases.
3 Considerations when Selecting your Tomato Cultivar
- Firstly, whether to grow heirlooms, hybrids or grafted varieties. Do you want to save seeds or space?
- Secondly, do you want large or small sized fruit? How do you intend using them in cooking and do you want to preserve them?
- Thirdly, whether to grow indeterminate or determinate varieties. Your space, microclimate and growing season will influence this decision too.
1. Heirloom vs Hybrid vs Grafted Tomatoes
First, heirlooms or heritage tomato varieties have been carefully saved for purity and handed down for generations – at least 50 to 100 years. For this reason, I favour old fashioned heirloom tomatoes because are grown for their flavour, size, yield or other beneficial characteristics like disease-resistance. Heirloom cultivars grow ‘true-to-type’ (identical to their parent plant). Their seeds are open-pollinated by insects or the wind.
Therefore, the key benefit of heirlooms is you can save seeds and grow future crops for free. You know they will produce an identical tomato. So, once you have grown your favourite varieties, try breeding your own cultivars. Choose the best characteristics that are adapted to your garden conditions. Then, save seeds so you enjoy future harvests with the same tomato traits. Learn more about saving and sourcing seeds.
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Next, hybrids are the result of a controlled pollination method. This is where pollen from two different species of tomatoes is crossed intentionally by a gardener. The purpose is that each parent plant provides a beneficial characteristic (such as early maturity). Thus, producing a better plant in the next generation.
Hybridization does happen randomly in nature too. If you choose hybrid seeds you will see them labelled as ‘F1.’ This indicates a variety that has been bred specifically for a desired trait. Hybrid plants tend to produce bigger harvests and grow better than the two parent varieties due to ‘hybrid vigor.’ This sounds good, right? BUT the fruits grown from F1 plants will produce genetically unstable, sterile seed. Consequently, you can’t save seed to use in following years. Why not?
F1 hybrids do not grow ‘true-to-type’ like heirlooms or grow as strong in the next generation. Hybrid plants will revert back to one of the parent cultivars. This means you have to keep buying new seed every year. So, hybrids are not a very sustainable choice and certainly more expensive! There’s huge pressure on seed banks globally. For food security, it’s safer to be self-reliant with the freedom to grow food from your own seed stocks.
Grafted tomato plants
Finally, grafted tomatoes are formed by joining two plants together. They are grown on vigorous, disease-resistant resilient rootstock. They produce a larger harvest, without compromising flavour. Grafted tomatoes can be ideal for container gardeners because you don’t need as many plants or as much space. You can also graft your own tomatoes.
But what about size?