I have a 2 changsha mandarin(1 1/2 feet tall), 2 ichang seedlings, 2 keraji seedlings, 2 meyer lemons and 1 thomasville citrangequat(2 1/2 feet tall.) I currently use Epsoma brand for citrus as fertilizer. It claims to fertilize every 4 months. However, I bring the plants in doors from Dec to March. Should I still fertilize then all of them? The seedlings? Also, what brands do other people on here use? Recommendations?

I use Dynamite with minors 18-6-12.

I use Scotts, Peters, or Jacks Classic 20-20-20 with minors for everything and have always gotten good growth. About three times a year I add some Epsom salt (mag sulfate) and once a year a dose of S.T.E.M. (soluble trace elements and minerals). Works well for every container plant on the place.

.....Alan.

If Dynamite's 18-6-12 is the same formulation as Osmocote's 18-6-12, and I think it is, it is a 8-9 month extremely slow release fertilizer. Normally used in conjunction with the planting of seeds, due to the fact that at first there is practically very little nutrient release, increasing as time goes by. This type of release coincides with the requirements of planted seeds.

I use Peters 25-5-15 W/trace elements. Peters 25-5-15 is the perfect 5-1-3 ratio required by citrus, most especially for containerized trees. Citrus trees absorb nutrients in the ratio of 5-1-3, meaning for every 5 parts of Nitrogen the citrus roots absorbs, they will always absorb 1 part phosphorus, and 3 parts potassium. This then is the nutrient ratio that needs to be used when replacing nutrients that were absorbed from the medium by the up take of the tree's root system. Fertilization must respect this ratio when the mineral in the leaves is satisfactory. Obviously, in cases of over dosage or deficiency of one or more elements this ratio should be changed to a more appropriate one. - Millet (1,063-)

Where do you buy or order Peters 25-5-15 at?

Unfortunately it seems difficult to find this perfect ratio fertilizer. Colorado, particularly the Denver metro area, has a huge greenhouse industry. I purchase my 25-5-15 fertilizer from the Denver Wholesale Florist Company, which is a wholesale supplier of greenhouse products. However, 25-5-15 is sold all over the USA by J. R. Peters Company, but unfortunately only in 25-lb. bags. http://www.jacksprofessional.com/ - Millet (1,062-)