Neither. Rdishes grow best in soil that is friable (easily crumbled or pulverized), well-drained, loose, high in organic matter, free from stones, with pH 5.8 to 6.8.
They use the coffee grounds as nutrient.
I grow my radishes in the fall.
plants will grow in coffee grinds as long as it is mixed with soil
nope
yes
No but fertilizer and lots of water help radishes to grow.
Click on you farm and select radishes then use smurfberries to get them
Sugar can stunt the growth of radishes or not allow them to grow at all. When sugar is added, the soil water itself will not be able to give the plant what it needs to grow. The roots that grow from the radishes are not adapted to absorb sugar.
ANSWER:Black coffee and even the coffee grounds can be added to the soil to increase the Ph of the soil. Certain plants will grow sluggishly in low pH. One of these is the Azalea. They like high pH soil and oak leaves and/or coffee/coffee grounds added to the soil or just placed on top of the ground will do this.
They grow from seeds.
nothing
No, it creates a gnat problem. I know from personal experience.