Quince is a flowering and fruiting tree native to the area around the Mediterranean Sea. It is a fruit and shares a lineage with roses, apples and pears. Quince trees are hardy in U.S. Department of Agriculture zones 4 through 8 and can be replanted most times of the year in temperate climates and should be planted in the spring after the last hard frost has come and gone in cooler climates.
Select a new location for your quince that has a full-sun exposure daily to maximize woody growth, flowering and fruiting.
Prepare a deeply tilled and nutrient-rich soil bed with a slightly acidic soil, pegged between 6 and 7 pH. Amend nutrient-deficient soil with several pounds each of compost and well-aged manure and a dose of slow-release granular fertilizer. Add ground sulfur to alkaline soil to increase acidity to within the ideal range using the product label recommendations.
Dig a hole at least twice the diameter of the quince tree's roots and a a foot deeper than the root ball. Slide the tree from its nursery pot or burlap wrap and place gently into the prepared hole. Add or subtract soil from beneath the root ball so that the top of the root ball sits level with the surrounding soil.
Fill the hole half way with amended soil and water in well. Fill the rest of the hole in with the amended soil and tamp down lightly to make contact with the root ball. Use the remaining soil to create a watering moat around the root ball. Fill the moat with water after allowing it to percolate down into the soil before refilling a second time.