Just started using a greenhouse on the land I have just 'acquired' which hasn't been used for quite some time. What is the best way to replace the old soil in the greenhouse?
Dig it out a spade depth and replace it from soil from the garden.
Chap in the plot next to me does it every year.
If it ain't been used for a few years, it might be worth double digging it, incorporating manure in the bottom, this will also relieve any compaction which has happened due to years of watering!
rgds, tony ;)
Or you can grow in bottomless buckets of compost if digging it out is too much to face this time... the big roots go down intot he border for water but the feeding roots stay in the bucket for ease of feeding and to avoid most of any nasties that have built up in the soil... :-X