When you say you have new seed
do you refer to purchasing a packet of seeds
recently? If so, those seeds
can be old or diseased. Some companies are notorious for selling such seed
. Very poor germination means old seeds
. Some seeds
will not be viable even if kept just over the winter.
A virus was found in seeds
several years ago. Plants grown from those seeds
and in turn seeds
saved from those affected plants might still be carrying the virus and showing up for sale.
Not every seed
planted is going to produce a plant. Look on your seed
package for the viability rate. Alyssum is a very slow growing
plant and then when it does get going its roots get disturbed in transplanting and it slows down again. Even in letting alyssum reseed it doesn't start growing
until the middle of June.
Alyssum resents disturbed roots. Fill individudal coir pots with soil. Sprinkle a few seeds
on top. When seedlings
appear remove all but one. When weather permits planting out then plant the coir pot directly into the ground. If using peat pots the tops need to be cut back and the bottom removed. Coir pots remove that hassle.