do gladioli flower just 1 year

They will flower again next year, but in theory, you're supposed to lift, dry off and store them and replant next year. In practice, I leave them out and they mostly grow again - think it depends where you live and how wet it gets, cos they can rot in the soil if left in waterlogged ,sodden ground.

Agree with Bamboo, you are meant to lift but mostly they will overwinter fine in the ground unless very wet.

can u plant ostospernum now and nuersturtion seeds plus my lawn is a bit patchy due 2 weed killer any ideas

Osteospermums sometimes survive outdoors in a sheltered spot, but I wouldn't be planting them now deliberately. Nasturtiums, I'd wait till early spring, though I think you can put them out now, see what the packet says.
For the bald patches in the lawn, you need to scratch up the surface on the patches to make a fine tilth, level a bit and sprinkle grass seed now - unless your last application of weedkiller was less than six weeks ago.

can u plant sweet pea seeds outside now or not

You having a laugh - never a thanks, but just more questions!!! No, you can't, wait till next year

many thanks bamboo

;-)))

what plants r easy care 4 pots troughs and hanging baskets over autumn and winter please and when u dead head pansies e.x.c. do you nip the whole head off or just the petals

Pansies - nip the whole head off, and try to take the stalk with it, to tidy the plant. If you leave the seedheads on, the plants stop flowering.

Other useful winter plants for troughs: Primulas, Primroses and Polyanthus, little evergreen trees or Euonymus, trailing ivy, wallflowers, small Skimmias, evergreen grasses like Carex and Festuca. Heucheras are good, too, and can be planted in the garden later!

If you go to your nearest Garden Centre, they often sell packs of plants too. Pop some small bulbs in underneath, as well, like Scillas, Iris reticulata, Narcissi (Tete a Tete) and Crocuses.