Rookie mistake?

I moved to a new garden a couple of years ago, it's huge compared to my old one and after concentating on the house I am now turning to filling the garden with a veg patch and flowers. Budget is a big factor and I'm hoping to grow lots of perennials from seeds (blown the budget on a greenhouse).
I've ordered some cheap plugs on offer from t and m and the lavender arrived today. Instead of growing them on in modules I've put them in the ground in the greenhouse. My thinking being they're less likely to dry out or be flooded by watering. Now I'm second guessing myself. Should I dig them up and pot them on tomorrow?
Also any recommendations for flowers for a cutting patch, I prefer cool colours.
Thanks
Amy x

 

Is your greenhouse heated?

 

@newbiemumof3 (Amy)

Nice to have you with us at GC...members will give you sound advice, as there's many who grow there own...sorry i can't help you as i don't do that and look forward to getting to know you

If you want members to help your further regarding your garden pictures added always helps members further.

 

Don't panic. Is it your intention to grow the lavender in the greenhouse? I imagine your answer to be no. That being the case, then I'd pot them up, let them develope a good root system and once all signs of frost etc is past and the soil is warmer, then they can be planted in the garden. Advantage being. Most plants will survive in pots and containers, so there is no hurry to get planting. Stored in or out of the greenhouse is immaterial. Hope this helps.

 

Hiya newbiemumof3
Morning and welcome
No, dont grow them in the greenhouse soil. Those plugs will be swamped there and will struggle.
I suggest you plant them in 9cm pots....keep them in the greenhouse for a week or two and then gradually get them used to be being outside by leaving them there by day and bringing in at night. In about 3 weeks' time keep them outside.
Lavendar are basically plants for outdoors and will, when growing well, thrive out there

 

Hi all thanks for the lovely welcome,
Greenhouse isn't heated no, I do have a clay pot or two knocking around and some tea lights so can improvise if needed.
Lavender is to be outside eventually as part of a sensory garden.
I also planted lots of bare root perennials in the bed yesterday to start off as the border isn't ready to plant those out yet and I didn't want them to dry out. Having the lawn all levelled and reseeded at beginning of April so can't measure out and plant borders until after then.
Job for today is to pot up the lavender, will the bare roots be ok where they are?
(I'll add a greenhouse photo when I can work out how)