Starter blocks give rooted cuttings and seedlings room to develop before they move to their final pot or slab. Here you'll find Agra-Wool starter blocks in 7.5x7.5 and 10x10 cm, Agra-Wool Big Blocks in 15x15 and 20x20 cm, and the Grodan Delta NG2.0 block in 7.5x7.5 cm. Most growers place a rooted plug into a block with a matching hole, which makes transplanting easy without disturbing the roots. Pre-soak the blocks in pH-adjusted water before use and let them drain. Choose a larger block if plants will stay in it longer. Start with plugs from propagation cubes & plugs and check pH with pH & EC meters.
Questions & answers about Starter Blocks for Cuttings
All growing questions →- Medium & pots How do I take cuttings and clone my plants? Cut a 10–15 cm shoot from a healthy mother plant just below a node, dip it in rooting gel, push it into a wet plug and keep it under a hu... Read the answer →
- Nutrients What do root stimulators do, and when do I use them? Root stimulators help new roots form, so use them on cuttings, seedlings and transplants. They're nice to have, not a must. Read the answer →
- Climate What is the ideal humidity in a grow tent at each stage? About 65 to 80% for seedlings and cuttings, 50 to 70% in growth, and 40 to 50% in flowering, a bit lower toward the end. Read the answer →
- Lighting How many hours of light do plants need in veg and in flower? Photoperiod plants usually get 18 hours on and 6 off in veg, then 12 on and 12 off to flower. Autoflowering plants can stay on 18/6 or up... Read the answer →
