March Zone 7/8
Almond - after flowering, Apple - as buds begin to appear, Apricot - after flowering, Azalea - after flowering, Bald Cypress - when leaf buds begin to show color, Beech - before buds come out, Birch - as new leaves appear, Camellia, Cedar, Chamaecyparis - Hinoki, Cherry, Cotoneaster, Crabapple - as buds begin to appear, Cryptomeria, Cypress, Elm, Fig (ficus), Ginkgo, Hackberry, Hawthorn, Hemlock, Holly - all, Honey Locust - as new shoots appear, Hornbeam - before buds come out, Jasmine (winter) - after flowering, Juniper, Maples - all, Pear, Peach, Persimmon, Pines - all, Plum - after flowering, Podocarpus, Pomegranate, Privet, Pyracantha, Redbud - as flowers begin to appear, Serviceberry - before buds open, Spruce, Sweetgum - as new buds open, Zelkova, Witch Hazel - before leaf buds open, Wisteria - after flowering, Yew.
Apple, Azalea - after flowering, Apricot 2/3 after flowering, Bald Cypress 0 only when actively in growth with green foliage to the top or branch (or when dormant and the branch is at least 1/2 inch in diameter - pinkie size), Cedar, Camellia, Cotoneaster, Cryptomeria, Cypress, Elm, Fig (ficus), Hawthorn, Hemlock,  
Holly - all, Hornbeam, Juniper, Maples - all, Mountain Laurel, Nandina - if old canes are too long, Pear, Pines - all, Privet, Plum - 2/3 after flowering, Quince (Japanese) - after flowering, Sasanqua, Spruce, Sweetgum, Wisteria, Yew, Zelkova.

Trim/Pinch New Growth: 
Azalea - pinch new soft growth until June 15, Bald Cypress only when actively in growth with leaves to the top of the branch, Beech - only new growth is trimmed in the spring; wait until new buds have elongated to where you can see individual leaves and then trim back leaving 2 to 3 leaves. Crabapple - trim new soft shoots, Hackberry - after new 3-5 nodes leaving one or two nodes - anytime during the growing season, Hawthorn - prune new soft shoots.
Bald Cypress, Cotoneaster, Crabapple, Fir, Pomegranate, Privet, Pyracantha, Quince - Japanese, Spruce.
Cedar, Chamaecyparis - Hinoki, Cherry, Cryptomeria, Cypress, Juniper, Peach, Pine - cork bark, Pomegranate.
This month is the beginning of concentrated bonsai activity. It is (depending on weather conditions) the start of a new growth cycle. Check your trees carefully for  
indication of new growth. For deciduous trees, the best time to re-pot, transplant and root prune (if necessary) is when the buds begin to swell and before the emergence of new leaves.  
Caution: It is better to be a little early than late. 
Check condition of your bonsai prior to root pruning. There is no need to root prune if the roots are not pod-bound (masses of roots pushing against the sides of the container) and roots indicate healthy growth (white root tips).  
Remember that root pruning will induce new growth below and above soil level and could drastically change the shape and design of your bonsai.  
However, a change of soil and re-potting (without root pruning) can be beneficial to the health of your bonsai. 
If you are potting your bonsai for the first time into a bonsai container, you will have to root prune to reduce the root mass to fit the container. The new top growth this procedure will induce can be controlled by pruning and pinching during the growing season. 
Re-potted and root-pruned bonsai should be placed in a shady area for at least two weeks. After two weeks the trees can be gradually be brought out  
into full light and your normal display area. 
Fertilizer should be withheld for at least six weeks to allow new roots to grow into the new soil. After the six-week period, you can start a regular fertilizer program. Top pruning and wiring, if called for in the schedule, should be done prior to re-potting or root pruning. March is also an excellent month to collect native plant material in North Georgia to add to your growing bonsai collection. Depending on weather conditions, insect activity could begin this  
month. Use appropriate insecticide to control any intense activity. Read manufacturer's label and use prescribed dosage. Too much is not better and  
could be injurious to your bonsai and to your health. 
Your display benches should be scrubbed and painted with a wood preservative. You can clean your benches with 1 part household bleach to 9 parts of water to kill fungi, mold and algae. You can use a pump type pressure sprayer to spray the solution and let stand for 5 to 10 minutes. Scrubbing with a brush may be  
necessary for stubborn areas. Rinse thoroughly with clean water. When completely dry, apply a wood preservative, even over treated wood, to prevent early decay. As with any chemical to be used around plants, read wood preservative label before using.