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Originally Posted by Spirit_Helper
when fertilizing with for example 20-20-20 in solution, which is the best way: immerse the pot in the solution until the top soil is moist or water it (ie. solution) thoroughly from the top? I currently water by immersion (up to the rim) and it takes about 20 minutes for my Fukien & Ficus and 30 minutes for my Ligustrum to become moist at the top soil.
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Hi Wes,
Note that either way you fertilize, you have to have a moist ground to begin with.
When you would water directly on dry soil, you'll get burned roots.
I water my trees lightly before fertilizing, than I water with the fertilizer from the top of the soil until the water flows out of the drainage holes.
Or I water the leaves or needles with a water mixture of 1/10 of normal fertilized water. Note that you don't give leaf fertilization to a Spruce or Douglas fir.
Normal watering can obviously done either way.
Hope this helps,
Wessel