If you mean the blue coloured miracle grow powder, which you are supposed to
mix with water, then please dig up the plant and wash the miracle grow away.
Cut back a little of the plant, and plant it in well drained gritty soil.
Don't cut back into the woody bits, or it will kill it. The flowers will
grow again next summer.
Chris S

Hi everyone

Sorry I didnt make myself clear, I was actually talking about a bag called
'miracle gro, plant and go' its like a black soil. I put half a bag of
this in the hole I'd dug.

I have now purchased gro bags and pots ready to take cuttings. I will take
'heel' cuttings as recommended on here, but I did notice that the woody bit
is actually a good two thirds of the stem of the plant, I wasnt expecting
this. The actual green part is only about four inches, so I just cut this
off with a little bit of the wood, right? (sorry, i've just inherited a
garden and i've a lot to learn to keep it looking as lovely as it is now!)
I will pot these seedlings, some in the house in pots, (maybe covering with
polythene) and some in the garden. At least that way i've a bigger chance
of some surviving.

The original plant is showing no signs of distress or wilting. It was moved
about four days ago now, but its looking like its always been there! So I
will also leave some of the lavender where it is unless it starts wilting,
then I will cut it all back to the beginning of the woody bit.

Sorry for the long post, and I will update with its progress if people are
interested.

Thanks again for the good advice

Shirl