[Fishyhaddock]

Anyone know why my bb seedlings are going anaemic. In a polytunnel - sited where last years toms grew. Does this mean I need to feed them? It's well ventilated...   Fishy

[deepinthewoods]

it could be due to lack of mineral uptake, the soil where the toms grew may still be chock full of nutrients and this can inhibit the beans ability to absorb what it needs, try gently forking the area around them over to let air in and then a good drenching of fresh water to take excesses away.

[Fishyhaddock]

Will give it a go - thanks d-i-t-w. Fishy

[Blonde]

I could also mean that they are in too wet a soil as well.

If they are iron deficient .........do they have green veins in thier leaves?

[Fishyhaddock]

Nope - leaves are just all yellow.

[Mo]

It could be a nitrogen deficiency, I'd give them a feed.

[Sylvia]

Surely you needn't feed seedlings, they get all their nutrients from the contents of the seed. Unless they are past the stage for planting out then they may need potting on if conditions say they can't be put outside. Are you giving them too much water? They may be starved of oxygen?

[Mo]

From what OP said, she's growing them in a Polytunnel so won't be 'planting out' and reference to leaves suggested the seedlings are advanced. My thought was simply that the soil in the PT may not have the nutrients the plants need to continue growth.