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Tomatoes: determinate or indeterminate, that is the question

Posted by on Wednesday 13 April 2011 in growing | 2 comments

I think I’ve just about reached the stage where my first set of tomatoes needs potting on.

These are the ones that survived the Great Damping Off Disaster of 2011 and they seem to be doing quite well. I have some later ones that are still in modules – they’ll need moving up a stage in a week or so but I think this first batch could use moving on ASAP as I think they’re a little cramped now and starting to suffer as a result.

Up until now, I’ve been more interested in the resulting type of tomato than the actual growing process – I’m a naughty gardener, naughty naughty – and I suspect my crops have suffered as a result.

Now that I’m trying to be more efficient though, I want to do things right. This “potting on” stage now will potentially be to the plants’ final destinations so I’ve been reading about determinates/indeterminates and that sort of thing to make sure the right tomatoes end up in the right pot. According to the wonderful Wikipedia,

Determinate, or bush, types bear a full crop all at once and top off at a specific height; they are often good choices for container growing. Determinate types are preferred by commercial growers who wish to harvest a whole field at one time, or home growers interested in canning. Indeterminate cultivars develop into vines that never top off and continue producing until killed by frost. They are preferred by home growers who wish ripe fruit throughout the season.

I have planted three main types of tomatoes this year: some rich Roma plums for sauces, some sweet cherry tomatoes (Sweet Million F1 – I sowed some yellow cherry Golden Nuggets as well but they all died in the aforementioned Damping Off Tragedy), and some “standard size” Moneymakers. Nothing too exciting but some variety – some for now, some for sauces, some for whatever.

According to a bit of Googling around, I’ve found Roma tomatoes are a determinate bush, Sweet Million an indeterminate vine and Moneymaker is another indeterminate vine, albeit with slightly bigger fruit.

I had hoped to grow some in the greenhouse (in big pots and growbags) but had thought I’d take advantage of some vertical height in the garden by growing some in hanging baskets/upside down containers too. (Although I’d keep said baskets/containers in the greenhouse for at least another few weeks until it gets a bit warmer.)

eHow (which I admittedly always read with a slightly sceptical eye) tells me:

For baskets, you will want to use determinate tomato plants because they will not continue to grow bigger than the basket can hold, while indeterminate ones will.

But equally, I have to consider tomato size:

The size of the tomato plays an important role in whether or not it is going to be best for growing in baskets. Traditionally, there is less room in hanging baskets for a plant to reach full maturity. Therefore, cherry tomatoes, grape tomatoes and other dwarf tomatoes will work best in hanging baskets.

Ok… The “standard size” indeterminate Moneymakers seem destined to grow as cordons from pots/bags in the greenhouse – easy peasy. But what about the Roma & cherry tomatoes? The determinate Roma may be suitable for a hanging basket as they won’t sprawl, but perhaps the plum size fruit will be too big/thirsty for in a basket? The cherry tomatoes are the perfect size for a basket but my variety’s indeterminate nature may cause problems there…

Any experienced tomato growers care to weigh in? Do you prefer all determinate or all indeterminate or a combination of the two?

2 Comments

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  1. lisa

    last year I grew moneymaker in growbags outside. We have a “heath robinson” affair of canes and sticks and string that we tie the tomatoes up with. I also grew some indertiminate cherry ones in the same way which did really well, but the determinate cherries in baskets did not do well, even though they had lots of water and feeding. I won’t bother with those again. I have also grown a yellow banana, which is a long yellow tomatoe. this year I am trying “chocolate cherry”. All will be outside in growbags and pots as I have yet to have my dream – a green house!

  2. louisa

    Ooh, exciting varieties!

    I think I should have enough of the determinate Romas to spread them around a bit so will try a few different places, inside and outside the greenhouse.

    I hope you get your greenhouse soon :)

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