No reply yet. Posting same question to seed starting forum.

I don't use Celcius. I use Farenheit. How deep did you plant them? Did you keep them constantly moist?

zzackey - it's easy enough to find the equivalents. Most of the world uses Celsius.

Lettuce has a germination inhibitor which cuts in at high temperatures. 30-36 is very hot.

zzackey, in the future just google a celsius to fahrenheit converter. I did to get the numbers below.

For US folks, 30 - 36 C = 86 - 96.8 F. That is very hot in my very cool and moist location even for the height of summer. (We only have a few days above 90 F per year.)

That aside, it is too hot for starting seeds. I would assume day time temperatures get more moderate at some point in the year? That would be the best time to start seeds.

FataMorgana

Thank you for replying. I planted most of them barely covered and some big seeds (like sage) 1/8 inch deep.

I kept them consistently moist.

@fatamorgana, Yes it is pretty hot but I am already growing parsley (both Italian and curl leaf), mint, peppermint and dill.

Should I sow seeds again or wait till temperature drops.

I'm not going to be much help; from your list, I've only ever grown dill from seed. But I know that dill seeds are supposed to germinate best between 10 and 20 degrees. I also only ever sow them in autumn because the plants don't last long here in summer. But you might not have that option. If it doesn't usually get much cooler over December/January where you are, then I reckon an air-conditioned room inside is your best bet, at least until they germinate.

A lot of seeds also need light to germinate properly. I cover dill seeds very lightly with soil, such that as soon as they start to sprout they've got a little bit of light to use for energy.

That may be pretty hot for some seeds but as I have said i am already growing parsley and dill.

Can you suggest some herbs that can grow in similar conditions to parsley and dill.

Several of the herbs you are trying to grow are much easier to propagate from cuttings than from seed. Oregano and marjoram will grow easily from cuttings. Even the small, green cuttings you get from the market will root and grow.

Sage and thyme also grow fairly easily from cuttings.

Rosemary is easier to grow from cuttings than from seed, but it's still difficult. Even with rooting hormone powder on the cuttings, I am lucky to get roots on one out of every three cuttings I try to root.

Also, your starting/growing mix sounds a bit heavy and too wet (holds too much water) for most herbs. Herbs, especially the Mediterranean herbs like rosemary, sage, etc., prefer very well drained growing mix. Some perlite or vermiculite with composted leaves is a good mix for those. Finer sand and composted manure will be heavy and retain far too much moisture. Even if the seeds germinate, or cuttings take root, the roots will rot quickly with too much moisture.

Sweet basil grows well from seed, but can also be propagated from cuttings. Dill grows best from seed, but again it likes good drainage, not soggy roots.

Your weather is too hot for most lettuce varieties. If you really want to grow lettuce, look for "heat tolerant" varieties. Even those are difficult to germinate in warm weather. Lettuce seeds need cool soil/starting mix, and light to germinate. They should be sown very shallow, or just scattered on the surface of the starting mix.