Can You Simply Throw Lead-Weighted, Oxygenating Plants Into Your Pond?
The answer to this question is a definite NO! Many different bunched oxygenating plants are sold in the aquatic pond plant industry, and almost all are sold with lead weights. The idea behind this is that the weighted bunch can simply be thrown into your pond. In theory, it will sink down to the bottom and start growing.
However, this is simply not the case for two very good reasons.
Oxygenators need silt or substrate
Firstly, all oxygenating plants with the exception of Ceratophyllum Demersum (Hornwort) require at least 4-6 cm of established pond silt, clay or added aquatic soil in which to root in to. This means that any lead weighted bunches added to new ponds or cleaned out ponds with no substrate or silt, will simply die off very quickly.
Not all oxygenators are suitable for all ponds
Secondly, many of the bunched oxygenating plants offered in the aquatic pond industry are only suitable for certain types of water garden, such as large natural clay bottomed ponds and Lakes. This means they will not survive when added to a small man-made back garden pond.
So, just to summarize, all lead weighted bunched oxygenating plants require silt/ substrate in which to root into, with the exception of Ceratophyllum Demersum (Hornwort). Any oxygenating plants sold in pots or bare rooted will need planting up. In other words, if you don’t have 4-6 cm of substrate, sediment or aquatic soil in the bottom of your pond, you will need to plant all your oxygenating plants (including those lead weighted), into aquatic baskets or aquatic planting bags. Always line Aquatic Baskets with Hessian or cloth liners to stop the Aquatic Soil from seeping out.
A Few Examples
The plants I have listed below require specific conditions which are in brackets
Egeria Densa (small garden ponds only)
Hottonia Palustris (natural clay bottomed ponds only)
Hippuris Vulgaris (large lakes sized ponds or potted in small ponds, highly invasive)
Myriophyllum Propium (small garden ponds only)
Nasturtian Aquaticum (likes running and moving water, excellent for filtration, ditches, swimming ponds etc))
Potamogeton Lucens (likes shade or dappled light)
Ranunculus Circinatus (likes shade or dappled light)
Fontinalis Antipyretica (likes cold, clear fresh water, likes to attach itself to shingle, stones and submerged branches)
Please visit my website www.lilieswatergardens.co.uk to see my full range of oxygenating plants and full range of over 750 pond plants and water garden plants. These are available to buy online or from my retail nursery in Surrey through-out the spring and summer.