The Grass Doctor

Does this seem like a great profile for a tomato fertilizer?

Nitrogen: 125 ppm Phosphorus: 44 ppm Potassium: 125 ppm Calcium: 14.3 ppm Magnesium: 47 ppm Boron: 0.32 ppm Sulphur: 34 ppm I'm puting together my own fertilizer but I want opinions on the profile before I go ahead and mix it. Any advice would be appreciated. Lindsey: I read a report online that tomatoes grown with this rate of Nitrogen do better. So I'm not sure about lowering it. I agree that I need more calcium. A better range would be 120-160ppm. But I don't know where to get it from. I have limestone but it doesn't come with a proportional rating so I can't be sure how much to use. btw, I'm growing indoors.

Public Comments

1. NPK is the standard ie. Nitrogen, Phosporous and Potassium that too in the ratio 1:1:1 the rest are redundant , Calcium comes from the same family as Potassium and .
2. You have all good neutrients but is the proportions correct ? I think you need a little more Phosphorus for fruit development and groth. But this just my opinion. Good luck
3. Well .... you let us all know how well they grow and taste ,,, will ya? I guess it should be allright, but be carefull so you dont burn them out with too much Nitro!!!
4. Hi, tomatoes don't need too much nitrogen, but do require comparatively more calcium and phosphorus. I would suggest you mix the fertilizer with approx: 1 part nitrogen 2 parts phosphorus 2 parts calcium and a hint of magnesium. Season with a bit of potasium if you like ;) Because tomatoes only have a low requirement of nitrogen, planting them in the same spot in the garden where you had beans or peas the previous year is not going to be to their liking. The main thing is get the frequency of watering and feeding right, which depends on whether the tomatoes are being grown in containers or in the ground. Tomatoes grown in containers will need more water and fertilizer than those grown in the veggie plot. You also need to be careful not to overwater or overfeed them, as that could negatively affect the flavour of the fruit and at worst kill them off - though killing tomatoes is rather difficult. Hope that helps and good luck!
5. Most gardeners use a more balanced mix for tomatoes. 5-10-10 or 8-16-16. I think you need to balance the ratios a bit closer. The plant needs more phosphorus for blossom and fruit production. The secondary nutrients, Calcium, Magnesium, Sulfur, etc. are usually of sufficient quantities in the soil so I would go easy on the ratio of these as well.