Continue applications throughout the growing season. Established St. Augustine tolerates most of the pre-emergence crabgrass herbicidies, says Jeffrey Derr, weed specialist at Virginia Tech's Hampton Roads Agricultural Research and Extension Center in Virginia Beach. My daughter started an orange tree from seed five years ago. This tree is taller than her but has failed to blossom. It does grow leaves and spikes.
Plants have a juvenile stage before they mature and fruit.
On orange trees, you get the stout thorns on young plants. Mature citrus trees have smooth branches, a process that can take 8- 10 years. Ivy is another plant where you can easily recognize the juvenile versus adult stage. Learning the juvenile vs. mature stages of plants is a fun-type learning process. Just like humans, plants must go through their childhood before becoming child-bearing adults.