A compact plant may be obtained at flowering time next year by pruning several times during the growing season. When the new growth reaches 12 inches, cut back, leaving four leaves on each new shoot. Repeat this type of pruning every time the new growth exceeds 12 inches. The last pruning should occur by the first week of September. Fertilize the poinsettia after pruning using a balanced or acid type fertilizer.
Magnesium deficiencies can cause older leaves to prematurely yellow.
An application of magnesium sulfate two to three times per year will help keep the leaves deep green. Although citrus trees grown in containers can be planted throughout the year, the preferred time is late winter or early spring. Select an area that receives full sun at least six hours per day. Remove all grass and weeds in that area for approximately three to five feet in diameter. Thoroughly spade the soil two feet deep and three feet wide.