I have a quantity of badly outdated powdered milk & research indicates tomatoes benefit from a milk spray occasionally, calcium I presume? I wondered about mixing some powdered milk in the soil at transplanting? If anyone has ever tried it, what amount did you use per plant? Thanks.
ETA: Sorry about the title, I can't seem to edit it.
I throw a handful into the soil at planting time (I have a small hand... maybe 1/8 to 1/4 cup at most).
I've used a 1:4 milk:water spray on my tomatoes when they are getting blighty looking. This mixture will kill the powdery mildew that affects squash plants and it seems to help tomato plants. Didn't hurt them, at any rate.
Powdered milk contains calcium. Percentage is small but in a form which makes it readily available to plants. For use as a foliar spray for tomatoes, it is worthless since tomato leaves aren't set up to absorb it.
Last year hubby over fertilized and we got blossom end rot. When I researched it online I came up with giving each plant a Tums and working a little powdered milk in near each plant. Fortunately a neighbor gave us a bunch of out dated powdered milk for the pigs, so I used that and some crushed egg shells. We had tons of tomato's after that.
I have never heard of using powdered milk but will give it a try. I do use egg shells around the plants. I have an old blender that was my Mothers and I use it to blend my organic pesticides and to grind up the eggshells to put around the plants.
As has been stated previously, the plants won't see any benefit from spraying but side dressing with a Tablespoon or two (provided the plant is already producing) will help to condition the soil and add beneficial nutrients. If you don't add the milk to the soil before planting I would wait at least a month before side dressing with it.
I put a dose under each plant at transplanting. My concern about using it in liquid form is a goofy half grown Golden Retriever. I'm concerned that the milk would make him tear up the plants? He's still not trustworthy to stay out of the garden as is evidenced by about 10 tomato plants broken off.