It depends on how often you can provide watering to your seeds and what is the soil temperature.
When you grow radish very early in spring in open ground its better to put radish seeds a bit deeper with adding much water in a trench. Also when you sow it in greenhouse and have no opportunity to water them several times a week put your seeds deeper (2-4cm).
In May outdoor and when your greenhouse is near your living house it is enough to sow at 0.5-1cm.
My rules are for once a week (on weekend) care 
__________________
1 kg=2.2 lb , 1 m=39,37 in , 1 oz=28.35 g , 1 ft=30.48 cm , 1 lb= 0,4536 kg , 1 in=2.54 cm , 1 l = 0.26 gallon , 0 C=32 F
Andrey a.k.a. TOMATODOR
|