Supporter® 4

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Origin

Supporter® 4 was bred at the Pillnitz Research Station near Dresden, Germany, in 1921 as a cross of M-9 and M-4. Little was known about it until after the fall of the Berlin Wall but it had been tested extensively in Eastern Europe.

Influence on Scion Habit

Tree vigor is somewhere between M-26 and M-7. Supporter® 4 has excellent fruit production with precocity somewhere between M-26 and M-9.

Disease Resistance

Supporter® 4 has low sensitivity to collar rot. It is sensitive to fire blight and rated between M-9 and M-26 in sensitivity.

Nursery Habit

Supporter® 4 roots very well in layer beds. It has a compact growth with little tendency for suckering.

Horticultural Value

Trees on Supporter® 4 are more uniform than those on M-26 with little burr knotting and overgrowth. This rootstock is ideal for low-vigor or replant sites and low-vigor varieties.

Inventory

Size: 1/8" 4-5mm

Amount: 3680

Size: 3/16" 5-7mm

Amount: 8136

Size: 1/4" 7-9mm

Amount: 7996

Size: 3/8" 9-12mm

Amount: 298

Size: 1/2" 12+mm

Amount: 0

Counts: Estimate

Regrade Inventory

Size: 1/8" 4-5mm

Amount: 4272

Size: 3/16" 5-7mm

Amount: 3885

Size: 1/4" 7-9mm

Amount: 2907

Size: 3/8" 9-12mm

Amount: 30

Size: 1/2" 12+mm

Amount: 0

Counts: Estimate

Pricing

Size	100-999	1,000-9,999	10,000 - 49,999	50,000 - 199,999	200,000 - 499,999	500,000 and up
1/8" - 4-5 mm	$1.245	$0.810	$0.700	$0.690	$0.670	$0.640
3/16" - 5-7 mm	$1.365	$0.890	$0.830	$0.810	$0.770	$0.740
1/4" - 7-9 mm	$1.485	$1.020	$0.960	$0.930	$0.890	$0.860
3/8" - 9-12 mm	$1.585	$1.040	$1.000	$0.960	$0.920	$0.890

Plus a royalty of $0.09 each

If regrade rootstocks are available, they are sold at 20% less list price.