General Japanese Black Pine care
Created by Matsu Bonsai in Zone 6 on 11/22/2008. Matsu Bonsai has been doing bonsai since 2001, and this regimen has 5 users currently using it. http://www.matsubonsai.com
Applicable Species: Japanese Black Pine (Pinus thunbergii ),

Development Stage: Growth/Ramification/Maintenance

Styling/Aftercare: Keep in partial shade after major styling work and pruning.

Notes: Japanese Black Pine is an extremely vigorous species. Keep the tree healthy and practice proper bonsai techniques for great success.

Spring/Summer Care: Spring is the time for heavy fertilizing and watering. Decandle in June. Begin fertilizing again in 6 weeks. Keep in full sun.

Fall/Winter Care: Fall cleanup should be performed every year. Thin the new growth, pull needles, arrange branches and clean the top 1/2 to 1" of soil. Spray with lime sulpher in winter to prevent fungus and pests.

Propagation Notes: Cuttings don't take easily. Cuttings taken in later winter or early spring planted in sandy soil have less than 50% success rate. Air layering and ground layering can take more than a year. Focus on seeds, seedlings, or grafted seedlings for greater su

Maximum Top Pruning:

Graph_3 Up to 1/2
Maximum Root Pruning:

Graph_4 1/2
Soil pH:

Graph_1 acidic
Organic Soil Preference:

Graph_inactive Not Specified
Cold Protection:

Graph_4 Protect Roots from Freeze
Sun Protection:

Graph_5 Full Sun
Water Preference:

Graph_4 Constantly Moist
Back Budding Ease:

Graph_4 Easy
  Jan Mar May Jul Sep Nov
Ph Cold Sun Water
Japanese Black Pine( Pinus thunbergii )
by Matsu Bonsai in Zone 6
Graph_1 Graph_4 Graph_5 Graph_4
feed 2 2 2 2 2 2 2
Fertilize with balanced solid (Organic) from when buds swell thru when leaves change color
For a medium sized bonsai add 4 cakes in spring. Add 2-4 cakes every other week until decandling. Remove fertilizer during decandling. Begin adding 2-4 cakes again 6 weeks after decandling. Add 2 cakes every other week until October. Remove cakes in November during fall cleanup.
feed 2 2 2 2 2 2
Fertilize with balanced liquid (Fish emulsion) from when buds swell thru end of growth
Deodorized liquid fish emulsion every other week during the growing season. Suspend fertilizing at decandling. Resume fertilizing 6 weeks after decandling.
feed 1 1 1 1 1 1
Fertilize with balanced liquid (Liquid Seaweed) from when buds swell thru end of growth
Liquid Seaweed alternate with fish emulsion. Suspend after decandling. Resume fertilizing 6 weeks after decandling.
feed 1 1 1 1 1 1
Fertilize with balanced liquid (Liquid Seaweed Plus Iron) from when buds swell thru end of growth
Liquid Seaweed plus iron alternate with fish emulsion and liquid seaweed. Suspend after decandling. Resume fertilizing 6 weeks after decandling.
prune prune prune               prune prune prune
major pruning, from after shoots harden, thru when buds swell
Major pruning should be done after the new needles harden. Protect the tree and keep from freezing during winter.
prune       prune                
pinch new shoots, from before buds open, thru when buds open
Very strong candles (one inch or more) should be pinched in half during mid-April. This will rebalance the energy to the other candles and slow the growth in strong areas.
prune           prune            
candle pruning, from when buds swell, thru when buds open
During the month of June decandling can begin. Do not decandle weak shoots. Start by completely removing small candles. Ten days later remove medium candles. Ten days later remove large candles. This will rebalance energy in the tree, reduce needles size, and promote back budding.
prune                   prune prune  
pruning to shape, from after shoots harden, thru when buds swell
Thinning, cutback, needle pulling, and cleaning of topsoil should be done in late fall to prepare for winter. Trees that were decandled will produce mutliple two or more buds. Fall is the time to thin to two buds. Needle pulling should be done to balance to growth. Keep more needles on the bottom and interior branches.
prune prune prune                    
pruning to shape, from after shoots harden, thru when buds swell
Additional needle pulling should be done to balance to growth. Keep more needles on the bottom and interior branches.
wiring prune prune prune       prune       prune prune
Wire from after shoots harden thru when buds swell. Check after 10 months.
The best time to wire black pines is between November and March. Wiring can also be done after decandling. Wire with copper wire strong enough to set the branch. Wire two branches with one wire. Make sure each branch is wired to the tip
repot   prune prune                  
Repot starting when buds swell thru when buds swell. Repot every 2 to 3 years.
Repotting is best done in later winter or early spring. Remove the tree from the pot. Rake bottom of soil. Comb out top roots. Add a drainage layer of pumice to the new pot and a small mound of soil. Place the tree and set the position. Wire tightly
Growth/Ramification/Maintenance
 
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