On Mon, 27 Mar 2017 22:24:29 +0100, Jeff Layman
wrote:

On 27/03/17 16:07, Judith in England wrote:

Anyone else experiencing problem or delays?

I sowed three different varieties in greenhouse a week ago today : container on
heated sand bed: thermostatic heater in greenhouse : and none have come
through. Previous years the first ones usually come through in three or four
days.

Pure coincidence I am sure : but a couple of colleagues have also experienced
slow germination this year of tomatoes.

I sowed a dozen or two 3-year old Golden Sunrise seeds in an 8cm pot and
put it in a heated propagator. Germination was pretty good in less than
a week, and the seedlings are now a week on and look fine.

Thanks: I did wonder about that as some of my seeds were from last year
(perhaps year before) and I wondered if they were too "old" !
But your experience says not. I think as someone has suggested it could be the
night time air temperature.