In message , Anne Welsh Jackson
writes
Gordon H wrote:
john martin writes
We have been given a couple of tomatoe plants that we would like to keep on
a south facing kitchen window sill. The height of the window is 32
inches
and they are already two thirds the height of the window frame.

Not knowing what tomato plants they are we dont know how high exactly they
will grow, but we think they will easily outgrow the window frame.

Since we want to keep them there in that location, are there any tips for a
novice on pruning, other than just cut the top off; when it reaches the top
of the frame?

I'm growing three plants in the same situation, although I have 42"
headroom. I intend to pinch out the new growth above the third
truss of flowers opens.

I would pinch them out just below the fourth truss.
That is, leave a bit of growth above the third truss.

Keep your hands of my truss, young lady!
On second thoughts . . .

I noticed rather late that two of my plants had bifurcated, and ISTR
that it is best to keep only the main stem for flowering.
Anyway, I cut one of 'em off, as it looked like one of those
"in-between" shoots which are supposed to be pinched out as soon as they
appear.
The Alicante was the most obviously bifurcated.
--
Gordon H
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