I've learned a lot from this year's foray into starting plants inside at an ultra-early date. First of all, the plants can spend most of their time outdoors in April,
which gives them the light they crave to prevent legginess. I do
have to take the youngsters in when nights are forecast to get below 45
since that really means 35 here, but Mark has been a good sport who
doesn't mind bigger and bigger plants taking up the entire front room
during cold spells. (We now eat on the porch.)
In addition to light, the
other important thing I've learned is that it's imperative to keep
seedlings growing fast since a stunted plant generally doesn't
recover. With precocious species like tomatoes, your best bet is
to pot them up out of their seedling flat as soon as you see the
cotyledons unfurl. Don't wait for true leaves or the plant will
already be starting to turn purple from the stress of searching for
nutrients in such a limited space.
For the sake of comparison, the photo above shows tomatoes of the same
age and variety, one of which was potted up and the others of which were
left behind in the flat. The difference is striking!
(You might get away with leaving the tomatoes in the flat much
longer if you basically turned it into a hydroponic setup, giving the
seedlings daily doses of liquid nutrients in the form of compost tea.)
Slower-growers like
peppers, on the other hand, don't mind sitting in their baby flats for
days and weeks. And don't give up on late-sprouters --- I put some
Malabar spinach seeds in one flat six weeks ago and they're just now
starting to come up. I'm not sure if they really needed that
extended time to germinate, or if something about being left outside
during heavy rains finally broke through the seed coat.
On the negative side, as the days warm and the weather turns humid, damping off
starts to rear its ugly head. Luckily, the seedlings I was
starting when damping off came to call were non-imperative --- zinnias
and experimental apple seeds.
But it's worth noting that there didn't seem to be any damping off for
seeds started in early March. Maybe this is a good reason to go to
extremes with jumpstarting spring?
More pleasantly, the big tomato plant Daddy gave me
has already set fruit, although the plant looks purple and
pot-bound. I'm itching to put it (and some of my own seedlings
that have flower buds) out, so I'll start checking the ten-day forecast
early next week. So far, once the current cold spell passes, the
lowest low is forecast to be in the mid 50s up through May 11.
Maybe I can start sinking these tomatoes deep into the earth for extra
roots and early harvests?