TGRC Soil mixes:

1) General Purpose Soil Mix

For 1 cubic yard of soil mix:

 

1 x 3 cu.ft. bale of peat moss
 

1 x 4 cu.ft. bag of vermiculite
 

2 x 4 cu. ft. bags of sponge rock
 

3 cu. ft. sand
 

1 x 3 cu. ft. bag of redwood compost

Steam for 1 hour, let cool over night.

Add:

4.5 lbs dolomite 65 AG

1.5 lbs Micro-max

5 lbs. APEX (14-14-14) slow release fertilizer

2) Desert Soil Mix

Recommended for S. pennellii and S. sitiens, but start seedlings in the general purpose mix.

Step 1: Mix ingredients below to make desert mix

 

1 part ground Canadian sphagnum

1 part uniform coarse sand (no silt)

1 part white pumice

1 part redwood compost

3lbs. of oyster shell/yd

3lbs. of dolomite/yd

3lbs. of singe super phosphate/yd

Step 2: Adding additional pumice

 

2 parts desert mix (from above)

1 part white pumice

 

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©1996-2012 TGRC, UC Davis
Tomato Genetics Resource Center
Department of Plant Sciences, Mail Stop 3
University of California, Davis
One Shields Avenue
Davis, CA 95616