Garlic and Union- have almost the same cultural components practices.
Land preparation, there are two methods of land preparation being practiced in onion and garlic production.
1. Thorough tillage or clean culture. This is done by plowing the field two to three times with more or less seven days interval.
2. Without tillage or zero tillage. This method of land preparation is generally done in lowland rice fields such as in Ilocos region. The rice straws are cut close to the ground after harvesting.
Preparation of Planting Materials, planting and transplanting. When planting garlic, select good-sized and well filled healthy garlic. Separate the cloves discarding the small ones in the center because these will produce small plants, hence small bulbs. Heavier cloves give better yield in terms of bulb size and weight irrespective of the size of the original bulb. Five hundred to seven hundred kilograms of cloves are needed to plant one hectare at wider spacing (14 to 25 cm). When closer spacing (5 to 8cm) is desired, 900 to 1100 kilograms of cloves are needed per hectare.
Planting should be done at the start of dry season. This is during the months of October to January in Type 1 climate; November to December to Type II climate; February to July in Type III climate; and February to April in Type IV climate.
The Ilocos method of planting is done with the aid of a pointed stick. The cloves are planted 1 to 2 cm deep vertically into the soil with the root plate down.