PurpleRhinoceros
Active Member
Reverse osmosis water, it's just fancy talk for that purified gallon of water you buy at the grocery store. You can also buy a filter for your house for like 200 bucks.ok cool....
sorry, whats RO water??
But I'm pretty sure you can start spraying early. I spray water on my cutting and seedlings. Someone said once not to spray during the rooting of a cutting, to wait for it to form roots, but eh, ill at least spray water on my cuttings... But I use DWC to clone, so I'm pretty care free when it comes to rooting clones. Don't even use hormones anymore, just water and air.
To directly answer, after the third set of true leaves. Thats the rule for topping, never top before the third node has grown, otherwise its too early. I'll just apply that here. Since 2 weeks could be too early depending on how slowly growth is going, i feel better with saying after the third set of true leaves have grown. That should be mature enough for a healthy foliar feed.