Replanning Your Tomato Bed in October: Before and After Against Late Blight
Wherever your tomatoes grew this year, something else should take over next season. A three-step bed plan helps you take away blight's foothold.
The tomato plants are cleared and the bed looks empty – which makes right now the best moment to plan next year. While you still remember what stood where and what went wrong, the plan almost writes itself. Here is a before-and-after example from a typical vegetable garden.
The before: three years of tomatoes in the same spot
Picture a bed of 1.2 by 4 metres: for three years the tomatoes have stood in the same place, with a few potatoes next to them because they’re related, after all. This summer blight arrived and the harvest ended early. That’s not bad luck, it’s almost predictable: tomatoes and potatoes are both nightshades and share the same diseases. That’s why they don’t make good neighbours.
Step 1: Record what stood where
Sketch the bed as it was this year and mark the spots where disease showed up. Do it now while your memory is fresh. Also note which plant families grew where: nightshades, brassicas, umbellifers, legumes. This overview shows at a glance where a family keeps repeating. If you like, add a few notes on varieties: which stayed healthy longer, which turned brown first? Observations like these are worth their weight in gold next year.
Step 2: Tomatoes move on, with a break of at least three years
The rule of thumb for tomatoes: return to the same spot only after at least three to four years, and not after potatoes, peppers or aubergines either. So divide your bed into sections and, in spring, move the tomatoes to a section that previously held something else. The pathogens behind blight survive on plant debris, which is why infected remains belong in the household waste, not on the compost. If space is tight, you can also grow tomatoes in a large pot with fresh soil, which interrupts the cycle of pathogens too.
Step 3: Put the freed-up space to good use
Where the tomatoes stood, cabbage or onion crops can go next year, for example. Until then, green manure or a layer of mulch protects the soil over winter. If you plant garlic now, the bed is usefully occupied until summer. Apart from that, little is sown or planted in October, so it’s better to let the soil rest under a cover. In spring, the area then gets a crop from a different plant family than the year before, so your vegetables move round the beds year after year.
The after: a bed with a schedule
In spring the tomatoes now stand on a new section, with plenty of air between the plants (50 to 60 centimetres) and basil as a neighbour that suits them well. Add a roof or at least a spot where the leaves dry quickly after rain. Crop rotation alone doesn’t guarantee protection from blight, but it takes away its head start – and that’s a big step. Also note the planting date in spring, so that in autumn you can compare when the first spots appeared.
Capture the plan right away
So the plan doesn’t get lost before March, record it digitally. In Rootivo you can set up your sections in the bed editor and use the companion-planting lines layer to see immediately which neighbours work together and which don’t.