This is one of the best way on how to grow your Calamansi Fast and make it bear fruit within one to two years.
1. First, the calamansi should be planted on a large container. Putting the calamansi plant on a container will make the roots stressed and as a result it will be forced to flower and bear fruits. Unlike when planted directly to the soil, the calamansi plant will grow its root and foliage first and will take around 5 to 10 years to bear fruit.
2. The container should have a lot of holes in the sides and bottom for air pruning. Air pruning will give it a better growth by oxygenating the roots and preventing root bound. You can drill the holes or melt it using soldering rod. There are also containers designed for air pruning like grow bags and aero pots.
3. Full sunlight at least 10hrs. Placed your calamansi plant that can provide it at least 10hrs of sunlight.
4. Water regularly but not everyday. Water only twice a week and if your plant is already 2 years old water only once a week to stress it and induce flowering. Continue watering once a week even when it started to produce fruits.
5. Feed twice a month. If you want your calamansi plant to grow really fast, you must feed it regularly twice a month either with organic or synthetic fertilizer with 14 days interval. Citrus plants need high nitrogen fertilizer like urine. If you want to use organic fertilizer then I recommend urine. Not only it is effective for making the calamansi plant grow fast and make it bear a lot of fruits, its also free. If your calamansi is in a container you need dilution. 1 Liter of Urine mix it to 10 liters of water, or a pail of water then apply it to your plant twice a month. If your plant is directly planted in the soil, 50% urine and 50% water. Apply it in the afternoon when the sun is going down to prevent nitrogen burn. If you want alternative organic fertilizer then you can use compost, vermicast, manure and apply twice a week in the afternoon. Another alternative is rice water or what they call hugas bigas in the Philippines. You can use it to water the calamansi everyday.
For synthetic fertilizers, you can use 14-14-14 complete fertilizer, 1 tbsp of 14-14-14 and dissolve it to 1 liter of water then use a can of sardine to measure it and drench 2 inch away from the stem. Don't apply on the leaves and directly on the plant or it else will die. Drench on the afternoon when the sun is setting down. Do this twice a month with 14-15 days interval.
6. You can start fertilizing your calamansi plant from seeds when it is already 1 month old. You can also use this same method with other citrus plants like lemons, lime, kiat, etc