This is a post I never expected to write. For the first time
ever, I am battling the dreaded blossom end rot. It is decimating my black
krims, attacking about half of the tomatoes on my heirloom plants, and has even
moved to take a couple of my prized bell peppers in their infancy.
A bounty of rotted goodness |
In past years, I’ve done just about everything the “wrong
way” in terms of container gardening. I’ve used pots that were way too small
for what I was growing. For example, last year I put four Abe Lincoln tomato
plants into each cat litter bucket, which holds about 5 gallons of dirt. I’ve
used the cheapest dirt I could find anywhere. The stuff I used last year was so
heavy that it pulled away from the sides of the container as soon as it dried
out (which was every single day). I might as well have just used dirt from the
yard. I would leave for 3 days at a time and when I would get back everything
would be so wilted I would wonder if it would come back or not once it was
watered.
All of that, and I never dealt with blossom end rot.
This year, I bought nice big containers, much better soil,
I’ve been watering far more consistently, and the plants have far more room to
grow than ever before. Yet now, nearly every singly black krim tomato I have
has blossom end rot. On the other heirlooms it is about 50%. I had 4 green
zebras with it also, but that plant’s fruit seems less bothered than the
others. All the cherry varieties are fine, with no blossom end rot in sight.
The cherries are doing great! |
I’m at a bit of a loss. Reading up on it merely clouds the
issue. Blossom end rot is caused by calcium deficiency in the plant itself, but
not necessarily the soil. Often the issue is that the plant cannot draw the
calcium from the soil, which can happen for a number of reasons. It could be
too little water, too much water, too hot, too cold, too windy, not windy
enough, or it just might have a headache. Okay, I made those last two up, but
essentially the cause could be anything, which makes it tough to pin down.
I don’t think it is too much water, as it has been hot and
very dry here. I think it has rained once in the past two weeks for more than 2
minutes. I’ve been watering about every other day or so, and in the past I’ve
never had an issue giving a potted tomato that was 4 feet tall “too much”
water, especially since the containers have ample drainage. As far as too
little water, that is possible, but as I said before my plants would be wilted
on a daily basis in the past because they were in ridiculously small
containers. I had one poor Abe Lincoln tomato in a gallon pot, and it would
wilt every day. Still, I got a few nice fruits from that plant, and I did not
get any blossom end rot. The tomatoes this year have very rarely wilted, but
the dirt is pretty dry when I water them (as tested with a soil moisture tester).
Most of the peppers are doing great as well |
This leads me to the temperature issue. It has certainly not
been too cold, so I can immediately toss that one out. It’s possible that the
issue could be the heat, especially since it has also been quite windy for the
past couple of weeks. The temperature has been in the mid 80’s to low 90’s for
a while here, and on the porch it can be a good 10 -15 degrees warmer than that
when the hot afternoon sun is blazing down on the plants. Couple that with the
almost constant wind lately, and it can be like a giant convection oven out
there. I have read that heat and windy conditions can stress the plants,
leading to less calcium absorption and blossom end rot, so it seems possible.
One last possibility could be too much nitrogen rich
fertilizer, but I also don’t think this is the case. I used some organic
chicken feather meal based fertilizer back in early May, and I applied one dose
of Miracle Grow tomato food in June. The chicken meal stuff (I don’t remember
the exact name) was low in nitrogen and high in calcium, and the MG tomato food
was pretty even across the board. I also use fertilizer sparingly, and apply
less than the dosage called for. I suppose it is possible that the added
fertilizer, along with the Sta Green mix, has a bit too much nitrogen and is interfering
with calcium absorption. This seems unlikely, given that I mixed the MG weak
and added maybe a cup of the mix to an 11.5 gallon container once this summer.
From the top, the blossom end rot isn't noticeable |
Not knowing exactly what is causing the blossom end rot
makes solving the issue a bit difficult. I have considered buying a foliage
calcium spray, which helps the plant absorb calcium quickly. It won’t cure the
currently afflicted fruit, but hopefully it will help new fruit. Then again,
this stuff has its supporters and detractors, and I tend to like to avoid
adding stuff from a bottle when I can (a lesson I learned from aquarium
keeping). It can’t really hurt, although many say that it does little to help,
and the plants will naturally recover and begin producing healthier fruit,
making the spray seem effective when the tomatoes would have been fine without
it. I might try a test and spray it just on my black krim plants, since I am
most excited for them, they are almost all being ruined by blossom end rot, and
at this point if I get a few plump, rot free, ripe black krims I am not going
to worry about whether it was the spray or just nature taking its course.
Carnival pepper mix (I think it is a white bell) |
Luckily, the peppers
mostly seem fine, aside from a couple that I lost to blossom end rot. I
normally lose one or two anyway, so that is no big deal. Hopefully it stays
that way. As I said above, all of the cherries are fine. Almost all of the
green zebras are also doing well, and seem rot free. It’s the heirlooms for the
most part, and especially the black krims, that are being affected. Some of the
heirloom plants were the seed mix, so it is possible that some of them are
actually also black krims, and I just don’t know it yet.
In my limited (and hopefully soon ending) experience with
this issue, there is almost nothing more frustrating than blossom end rot. When
you have healthy, green, large plants loaded with tomatoes, and almost every
one is being destroyed by blossom end rot it can be very discouraging.
The okra is loving this sun and heat! |
On a positive note, the eggplant and the okra seem to
absolutely love the blazing heat and hot wind. When we got home from a camping
trip yesterday, almost everything looked wilted except the okra and eggplants.
I think the okra grew 4 inches in a few days. We have even harvested two pods
from the red okra plants, which are only about 8 inches tall. In fact, they
didn’t even begin to look healthy until it became unbearably hot out here, and
now they look beautiful! If nothing else, we know that okra and eggplants seem
to love the heat and wind on the porch. Hopefully in a few weeks I’ll be
writing a post about how all of this blossom end rot stuff has resolved itself
and the tomato harvest is rolling in.
White eggplant emerging |
Until next time, happy gardening!
Blossom end rot is no fun, I had a few years ago and it took a season to fully recover. We just put a bunch of egg shells in the soil.
ReplyDeleteI'm with wendy I also had the same thing added eggs shells and perfection
ReplyDeleteThanks for the suggestions! I decided to go with calcium spray for an immediate kick, and in the future I am going to save eggshells and mix them right into the potting mix before planting.
ReplyDelete