Lavender seedlings, mine are indoor and 2-3" long,about 25 in a seedling tray in a mix of fine potting?

compost and some gritty topsoil. Where do I get "poor soil" to pot them on into, would a mix of sand and potting compost be well drained and poor enough for them ? The soil in my garden is heavy clay ,so I can't use that.

Lavender seedlings, mine are indoor and 2-3" long,about 25 in a seedling tray in a mix of fine potting?
I am not certain I understand your question completely; however, a mixture of sand + composted material + your clay soil should be fine. Of course, if the clay soil is truly very clay-ey (saturates/does not drain, etc) then I would continue to add more sand, if possible.





I wouldnt focus so much on the "poor soil" angle - but, rather how well the drainage of the soil is - particularly being you identified your soil as a clay type.





Important not to use sea sand either.





Good luck.
Reply:yeah that will be fine but first you should dig out sum of the clay then backfill it with your sand and potting compost and let nature take its course. hope that helps.
Reply:You should be able to find some cactus mix or succulent soil. Or you could add some sand to potting soil to increase drainage. I have seen them potted in 4 inch pots by nurseries in what looks like regular potting soil to me and they do OK.
Reply:Mix 1/2 compost and 1/2 river sand and this will be a good free draining mix for your lavender seedlings.





Lavender doesn't need 'poor soil' it's just that they can grow well in poor soil but they grow better in healthier soil.